The amount of protons in an atom's nucleus is what is known as the atomic number, according to models at the atomic scale. The identification of an element is determined by its proton count.
What is atomic-scale model?Everybody is aware that the things around us are formed of matter. We also know that the three subatomic particles are electrons, protons, and neutrons. But an atom has where all of these subatomic particles live. This essay will address all of these questions and describe how important Atomic Model breakthroughs were produced.
In order to better define and comprehend the atomic structure, we have developed five fundamental Atomic Models. The amount of protons in an atom's nucleus is what is known as the atomic number, according to models at the atomic scale. The identification of an element is determined by its proton count.
Therefore, the amount of protons in an atom's nucleus is what is known as the atomic number, according to models at the atomic scale. The identification of an element is determined by its proton count.
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A cube of zinc at 15.C is placed in contact with a cube of tin at 45. Which statement describes the initial flow of heat between the cubes? *
Which phrase best describes the composition of Earth’s surface?
mostly water and some solid rock
mostly solid rock and some water
mostly liquid rock and some water
mostly water and some liquid rock
Answer:
??
Explanation:
Is there currently a cure for HIV
Answer:
No
Explanation:
There are vaccines, to prevent it, made by Dr. Fauci, but no cure
The total bonding energy for the products of a reaction is 2535 kJ/mol and the bonding energy of the reactants is 1375 kJ/mol. Calculate the change in enthalpy, and classify the reaction as endothermic or exothermic.
-1160 kJ/mol, endothermic
1160 kJ/mol, exothermic
-1160 kJ/mol, exothermic
1160 kJ/mol, endothermic
Answer:
-1160kj/mol
Explanation:
the reaction is exothermic because heat is released to the environment
Where does the second stage of cellular respiration
occur?
W
Х
Y
Z
Please hurry this is a test
Answer:
X is your answer Have a good day
Explanation:
The pyruvate molecules from glycolysis next enter the matrix of a mitochondrion. That's where the second stage of cellular respiration takes place. This stage is called the Krebs cycle. During this stage, two more molecules of ATP are produced
Answer:
z
Explanation:
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Answer:
A
Explanation:
Complete the following reaction.
Answer:
14C6(1st one)
Explanation:
by balancing the reaction on the right and left,the right side miss 6 from number of proton and 14 from mass number....
1) h2+o2 -> h2o
does equation 1 follow the law of conservation of mass? how can you tell?
Answer:
The given equation not following the law of conservation of mass.
Explanation:
H₂ + O₂ → H₂ O
The number of oxygen atoms on both side of equation are not equal thus mass is not conserved and this equation not follow the this law.
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
2H₂ + O₂ → 2H₂ O
there are two oxygen atoms and four hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
What element do you think would easily react with Calcium? Why?
Answer:
On heating, calcium reacts with hydrogen, halogens, boron, sulfur, carbon, and phosphorus.
Explanation:
Electron configuration: 1s22s22p63s23p64s2
Atomic number: 20
Atomic weight: 40.078
Oxidation state: +2
Please answer correctly !!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!
Answer:
C
Explanation:
Hope this helps Mrs. or Sir
Mole Conversion: How many molecules are in 0.348 moles of Dihydrogen oxide?
2 questions Help need asap help thank you so 80 points and branliest random answers are reported plus deleted questions are in picture it’s for science retaking a test
What is a reduction reaction? O A. A reaction in which negatively charged particles are in the products B. A reaction in which charged particles form an ionic compound C. A reaction in which an atom has gained 1 or more electrons D. A reaction in which an atom forms a new isotope by gaining neutrons
Answer:
C
Explanation:
Reduction is a chemical reaction that involves the gaining of electrons by one of the atoms involved in the reaction between two chemicals. The term refers to the element that accepts electrons, as the oxidation state of the element that gains electrons is lowered.
What is the main reason that atoms lose or gain electrons to become ions?
Atoms that lose electrons acquire a positive charge as a result because they are left with fewer negatively charged electrons to balance the positive charges of the protons in the nucleus. Positively charged ions are called cations. Most metals become cations when they make ionic compounds.
What is the total number of sulfur atoms in Mg2(SO4)3
AnswerElement Symbol # of Atoms
Magnesium Mg 1
Oxygen O 4
Sulfur S 1
:
Explanation:
How many moles contain 9.15 x 1022 atoms of Ag?
Select the correct response.
0.152 mol
9.15 mol
0.325 mol
5.51 mol
Answer:
0.152 molExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{9.15 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.151993...[/tex]
We have the final answer as
0.152 molesHope this helps you
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Changing which factor would NOT have an influence on the kinetic energy of a moving van loaded with 100 kg bags mulch of with a total mass of 1,500 kg. The vehicle is traveling across an open parking lot at a speed of 5 m/s.
Question 5 options:
direction the moving van is going across the parking lot.
increasing the rate of speed without altering the mass of the vehicle or its contents.
adding more contents (increasing the overall mass) to the van while the van is in motion traveling 5 m/s.
emptying the moving van one bag at a time at a constant rate.
Answer: the first option
Explanation:
Direction has nothing to do with the speed/ kinetic energy
Answer: A
Explanation:
Which types of bonds are responsible for a material's high thermal conductivity ?
A. Ionic bonding
B. Covalent bonding
C. Metallic bonding
D. Gaseous bonding
Answer:
b
Explanation:
Please help me out I need to know what the two atoms have in common.
Answer:
I think it's atomic number?
Explanation:
Really sorry if that's wrong
balance this equation
Balanced equation
2Pb(NO₃)₂⇒2PbO+4NO₂+O₂
Further explanationGiven
Reaction
Pb(NO₃)₂⇒PbO+NO₂+O₂
Required
Balanced equation
Solution
Give coefficientPb(NO₃)₂⇒aPbO+bNO₂+cO₂
Make equationPb, left=1, right=a⇒a=1
N, left=2, right=b⇒b=2
O, left=6, right=a+2b+2c⇒6=1+2.2+2c⇒6=5+2c⇒1=2c⇒c=1/2
The reaction becomes :
Pb(NO₃)₂⇒PbO+2NO₂+1/2O₂ x2
2Pb(NO₃)₂⇒2PbO+4NO₂+O₂
name the process of separating into immiseible liquid?
Answer:
Decantation
Explanation:
Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
What is the molar mass of a substance?
ОООО
the mass in grams of one mole of a substance
the number of particles in one gram of a substance
the number of moles in one gram of a substance
the mass in grams of one particle of a substance
oops pls forgive me I accidentally did the wrong question.
In an ecosystem animals compete for all factors, except?
A.) Water
B.) Toilet Paper
C.) Food
D.) Sunlight
Consider the compound Al(OH)3. What type of
solid does it form?
crystal lattice
glass
metal
molecule
Answer:
crystal lattice
Explanation:
The Aluminium Hydroxide forms a crystal lattice solid structure, the correct option is A.
What is a Crystal Lattice?The symmetrical, three-dimensional structural configuration of points representing atoms, ions, or molecules that make up a crystalline material is known as the crystal lattice.
It can be described as the geometrical arrangement of the crystalline solid's atoms, ions, or molecules as points in space.
Al(OH)3 is called Aluminium hydroxide, It is found in nature as the mineral gibbsite.
It is an amorphous white powder and is insoluble in water but soluble in acidic and alkaline solutions.
It can be used to relieve indigestion and stomach discomfort.
Al(OH)₃ is composed of two layers of hydroxyl groups, with aluminum ions filling two-thirds of the octahedral holes in the center of the structure.
There are four identified polymorphs. Each has layers of octahedral aluminum hydroxide units connected by hydrogen bonds.
So, the solid form of the compound Al(OH)₃ has a crystal lattice structure.
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how does newton’s third law effect bowling?
Answer:
The bowling ball will remain in motion until an unbalanced force acts on the bowling ball. ... When the ball hits the pins, they push on the ball with the same amount of force in the opposite direction. This means that the ball will slow down, and the pins will fall, which is the reaction.
Explanation:
Answer: His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.
Explanation: this means that when you throw the ball the wind pushes against the ball and so does the bolling pints.
If a calcium atom can give off two electrons in a reaction with
nitrogen, which of the following formulas represent the
compound formed?
a CaN2
b Can
c Ca3N2
d None of the above
Answer:
c. Ca3N2
Explanation:
What Is the smallest functional and structural unit of all living organisms
Answer:
A Cell
Explanation:
Answer:
Cell
Explanation:
The cell is the smallest structural and functional unit in living organisms that can live on its own. It is also considered the building block of creation.
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Answer C because the earths tilt causes the seasons
FIRST ONE TO RESPOND CORRECTLY GET BRAINLESS
Answer:
sorry but we can't answer without the pic
Explanation:
Sodium-22 has a half-life of 10 hours. how much sodium-22 will remain in a 80.0 g sample after 50 hours?
# of half lives
grams remaining
Answer:
you would need to times the equation
Explanation:
