Answer:
The real order is
Rb(37)
Sr (38)
In(49)
Sb (51)
Te(52)
Explanation: Good luck
Elements, from top to bottom, in the correct order of increasing atomic radius starting with the smallest is Rh ( 37 ), St( 38 ), In ( 49 ), S ( 51 ), Te ( 52 ).
What is an element ?A chemical element is a species of atoms, including the pure material made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.
Any compound that cannot be broken down into simpler chemicals by regular chemical processes is referred to as a chemical element or element. The building blocks of which all matter is made are called elements.
Protons, neutrons, and electrons make up atoms. A compound can be created by combining two different types of atoms. A molecule is a group of atoms that can't be separated from the bigger material it is a part of while still keeping its characteristics.
Thus, Rh ( 37 ), St ( 38 ), In ( 49 ), S ( 51 ), Te ( 52 ) this is the correct order of an element increasing atomic radius starting with the smallest.
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Which of the following is not part of a flower's pistil?
ovary
style
stigma
anther
Answer:
anther is not a part of the flower pistil
Imagine you push a book across an incredibly slippery surface. It slides right across because there is NO friction. Next, you push the same book across a rougher surface that exerts friction.
Will the velocity of the book change as it moves across the surface with NO friction?
Answer:
Yes
Explanation:
cuz i learned that in 7th grade
This group of elements is located in the center of the periodic table
O alkaline-earth metals
O alkali metals
O halogens
transition metals
Answer:
Transition metals are located in the center.
2. Calculate the mass of 2.4 moles of
ammonia, NH3.
Answer:_grams
A student performing this reaction
makes 8.5 grams of ammonia, NH3. How
many moles of ammonia did she make?
Answer:_moles
PLEASE HELP!!!! What is the abbreviated electron configuration for nitrogen and for chlorine
Answer:chlorine’s is (Ne) 3s2 3p5
Explanation:lol
Answer: chlorine [Ne] 3s² 3p⁵ nitrogen 3s²2p³
How many moles are in 48 grams of Chlorine? ( hint remember some elements are diatomic)
Answer:
bcdhbhdbfsjbcs,kfhgbsaefg
Explanation:
srry preicsoe pntosod
Which ion has the electron configuration of a noble gas
Answer:
chloride
Explanation:
Archimedes himself had a mass of 52 kg when he discovered displacement. If his density was roughly 12 g/mL, calculate the amount of water he would spill out of a full tub.
Answer:
7.75 kg
Explanation:
Archimedes’ principle tells you that the weight of the water displaced is equal to the buoyancy force:
To keep the wood afloat, the buoyancy force must have the same magnitude as the force of gravity on the block, so
The volume of water displaced is
So the mass of water displaced is
Thus, the mass of the piece of wood is 7.75 kilograms.
Help help please What conclusion can you draw about the relationship between physical activity and a
person's pulse rate?
Answer:Depending how fast the max pulse rate is is how active you are
Explanation:
Which of the following reactions involves two or more substances combining to form a new compound?
F single replacement reaction
G combination (synthesis) reaction
H decomposition reaction
J combustion reaction
Answer:
combination (synthesis) reaction
Which numerical setup can be used to calculate the heat energy required to completely melt 83.5 grams of H2O(s) at 0°C?
Answer:
(83.5g)(334J/g)
Explanation:
found it
Answer:
(100. g)(4.18 J/g•K)(273 K)
Explanation:
bc
Why would two populations
of organisms compete for
resources in an
ecosystem?
Answer:
For shelter, will to live, offspring, etc.
The resources may be in low supply and they will have to fight or die
Explanation:
What is a substance
Answer: A substance is a particular kind of matter with uniform properties
Explanation:
A space probe is launched from the surface of Earth into space. After 30 minutes, the space probe runs out of fuel and the rocket engine stops but the space probe continues moving at
a constant speed. What concept explains this phenomena?
friction
gravity
inertia
mass
Answer:
inertia
Explanation:
because an object will keep moving until something slows it down, the probe is still going because of inertia.
The following Lewis structures represent valid resonance forms. true or false
Answer:
true
Explanation:
because Lewis represent valid resonance
The given Lewis structure does not show valid resonance form. So,the given statement is false.
What is Lewis structure?The Lewis structure is the representation of the of valence shell in the molecule.
What is valence electron?The electron present in outermost shell and which involve in chemical bond formation is called valence electron.
What is resonance structure?Resonance is way to explain the localisation of electron in molecule where Lewis formula fails to describe.
The given statement is false because both structure shows different number of valence electron.
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Mole Conversion:Find the number of moles in 384g of cobalt.
Answer:
6.51585239863
Explanation:
divide the grams by the molar mass
384/58.933195
Which of the following is a compound?
A. Zinc
B. S8
C. CaCl2
C. Calcium is your best bet. Calcium chloride is amongst inorganic compounds.
This is the chemical equation for the production of ammonia (chemical formula: NH3) from Nitrogen and Hydrogen (N2 and H2):
N2 + H2 --> NH3
A student balanced the above chemical reaction as follows:
N2 + H2 --> N2H2
Explain why this is the incorrect way to balance an equation.
Answer:
Honestly, I'm not even sure what the incorrect student was trying to do. The correct answer is:
( ) = the number of elements
(1)N2 and (3)H2
I think the student added the N2 and H2 to "balance" the chemical equation when instead they should have tried the balance the equation by making sure the atoms on the reactant side are equal to the atoms on the product side. You do this by multiplying the atoms on the reactant side until they equal the product side (not by adding them, as the student did).
This is an incorrect way to balance a chemical equation as coefficients are added in front of chemical formula rather than as subscripts.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Despite what is portrayed in science fiction movies, if you witnessed a battle in outer space, you would not hear sound. Explain why.
Answer:
The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound.
Explanation:
The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound.
Answer:
There is no air in space for sound waves to travel
a material is said to be ductile if it _
Answer:
can be drawn into wires.
Explanation:
A material is said to be ductile if it can be drawn into wires. Metals, for example, are very ductile as compared to non-metals. These wires are generally used for conducting electricity.
your welcome hope its right! can i have brainliest?
Why isnt water on the periodic table?
Answer:
Because its not a pure substance. It is a combination of pure substances.
Explanation:
The electron dot diagram for a neutral atom of chlorine (atomic number 17) is shown below.
Which of the following symbols represents a chlorine ion with a stable arrangement of eight valence electrons?
electron dot diagram of chlorine
A. 35Cl1-
B. 35Cl2-
C. 35Cl1+
D. 35Cl
Which of the following BEST explains why the tectonic plates of Earth move?
Answer:
The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth’s mantle and fit snugly against one another. The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other.
Which shows the atoms in order of decreasing atomic radii? A) F, Cl, Br B.) Cl, F, O C) S, Cl, F D) N, C, B
Answer:C) S, Cl, F shows the decreasing order of atomic radii across a period and down a group
Explanation:
The Trend of atomic radius in a period occurs like this :
decreases from left to right as you go across a period. This is because of the shrinking of the nucleus as electrons are being added to the same orbital or shell conferring on the nucleus a positive charge as protons are also being added to the nucleus causing an attraction of the positively charged nucleus to electrons.
Increase down the group-This is because of the increasing energy levels caused by an increase in the number of shell causing a gap between outermost shell and the nucleus.
--Therefore On the same group, as you move across the period 3, Sulphur has a larger atomic radius than chlorine and on group 17 chlorine has a larger atomic radius than Fluorine.
Identify the group or period that matches each description.
a. Elements with 6 energy levels
b. Elements with 2 valence electrons
Answer:
a.6th period
b.groupIIA
3. The electron configuration of 2-6-1 represents an atom of *
oxygen and is in the ground state
fluorine and is in the ground state
oxygen and is in the excited state
O fluorine and is in the excited state
The increase in metabolic rate after a meal is called
Answer:
The thermic effect of food.
Explanation:
The process in which metabolic rate increase after meal is called the THERMIC EFFECT OF FOOD.
THERMICAL EFFECT OF FOOD can be defined as the way in which some calories a person or an individual consumed after meal help to break down the food for easy absorbing and to store the food consumed while some are burn off during execise which is why a person or an individual metabolic rate may elevate after meal, during exercise or due to some other factors reason been that human body makes use of energy everyday due to day to day activities.
Example a person who consumed a protein food may experience high THERMIC EFFECT than the person who consumed food that contained fat or carbohydrates reason been it can take a long time for such person body to break down the food, burn and absorb the protein.
Therefore The increase in metabolic rate after a meal is called THERMIC EFFECT OF FOOD.
Whats the equation and answer for these two separate questions!!
Answer:
3).
[tex]time = \frac{distance}{speed} \\ time = \frac{225}{3} \\ time = 75 \: s[/tex]
4).
[tex]speed = \frac{distance}{time} \\ speed = \frac{110}{55} \\ speed = 2 \: {ms}^{ - 1} [/tex]
this is the number of protons and neutrons i the nucleus of any atom
Answer:
The mass number is defined as the total number of protons and neutrons in an atom. Consider Table below which shows data from the first six elements of the periodic table. Consider the element helium. Its atomic number is 2, so it has two protons in its nucleus.
Explanation:
Which of the following statements is FALSE regarding elements
A-all of the answers are true regarding elements
B-they make up matter
C-each element has a unique set of physical and chemical properties
D-elements can be grouped together based on properties they have in common
E-they can be broken down into simpler substances
Answer:
E-they can be broken down into simpler substances
Explanation:
Elements cannot be broken down into simpler substances.
In fact, the very definition of a chemical element is based on that property. If a chemical substance can be broken down into simpler substances, it is not an element, but a compound.
