What atom has 35 protons and 47 neutrons ?

Answer:

Yes

Explanation:

Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.

Exothermic reaction - A chemical reaction in which heat energy is given out .

Buring of natural gas , respiration, formation of compost from vegetables matter also exothermic processes.

Examples

C(s)+O2(g)⸻➤CO2(g)+94.00kcal

2H2(g) +O2(g)⸻➤2H2O(l) +136.0kcal

Endothermic reaction - A chemical reaction in which heat energy is absorbed is called endothermic reaction.

Example

C(s)+2S⸻➤CS(l)-22kcal

C(s)+H2O⸻➤CO(s) +H2(s)-31.4 kcal

{ ⸻➤at 1100°C }

Answer:

24.68 g/cm³

Explanation:

We'll begin by calculating the volume of the marble. This can be obtained as follow:

Volume = 17 × 23 × 4

Volume = 1564 cm³

Next, we shall convert the mass of the marble (i.e 38.6 kg) to grams (g). This can be obtained as follow:

1 kg = 1000 g

Therefore,

38.6 kg = 38.6 kg × 1000 g / 1 kg

38.6 kg = 38600 g

Therefore, 38.6 kg mass of the marble slab is equivalent to 38600 g.

Finally, we shall determine the density of the marble slab as follow:

Volume = 1564 cm³

Mass = 38600 g.

Density =..?

Density = mass /volume

Density = 38600 g / 1564 cm³

Density = 24.68 g/cm³

Therefore, the density of the marble slab is 24.68 g/cm³

Answer:

Gold

Explanation:

Answer: Gold

Explanation:

Au represents gold

Answer:

Light Exposure and Water Movement. Along with food, algae require the right amount of light to thrive. ... Filamentous algae will typically grow around the shoreline of a pond or lake because this is where the shallower water is.L

Hope that helps :)

Answer:

algae will typically grow around the shoreline of a pond or lake because this is where the shallower water is.

Explanation:

132 cm to 0.00132 km.

there you go, hope this helps!

Answer: Positive ions that have lost an electron are smaller than their neutral atoms. Negative ions that have gained an electron are larger than their neutral atoms.

Explanation: I found this in my chemistry textbook.

Neutral atoms increase in size down a group and decrease across a period.

If neutral atom gains or loses an electron, forming anion or cation, increase or decrease in radius occurs and this trend differs from that of atomic radii.

Atomic radius or Radii is defined as the total distance from the nucleus of the atom to the outermost orbital of its electron, similar to radius of a circle.

The determination of  the atomic radii is difficult due to the uncertainty in the position of the outermost electron, so Heisenberg’s Uncertainty Principle is applied to obtain a precise measurement of the radius.

An atom also show different radii depending on the type of  bond, hence there is no fixed radius of an atom.

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Answer:

1. 749.6

2. 159.8

3. 60.4

4. 19,840,275

5. 8.029118938015202

6. 267.984

7.  1,017.169517

8.  45,945

9.   28,710

10.  14.42169022209403

11.    0.1341

and that is all that I am going to give you for the last few try to use a calculator    

Explanation:

use a calculator

Explanation:

(1) 1 m = 100 cm

1.45 m = 100 × 1.45 cm = 145 cm

(2) 1 kg = 1000 g

325 g = 0.325 kg

(3) 1 L = 1000 mL

0.0024 L= 2.4 mL

(4) 1 km = 1000 m

[tex]1.55\times 10^4\ m=1.55\times 10^4\times 0.001=15.5\ km[/tex]

(5) 1 mm = 0.001 m

[tex]4.75\times 10^{-2}\ m=4.75\times 10^{-2}\times 1000\ mm\\\\=47.5\ mm[/tex]

(6) 1 kg = 100000 cg

0.459 kg = 45900 cg

(7) 1 dm = 10⁻⁴ dm

5,995 dm = 5,995 × 10⁻⁴ km

(8) 1 g = 1000 mg

450 g = 450000 mg

(9) 1 dm = 100 m

0.003 dm = 0.3 mm

(10) 1 mL = 0.001 l

4.567 × 10⁴ mL = 45.67 L

Answer:

7 orbitals

Explanation:

An f sublevel has 7 orbitals

According to the Aufbau principle, the number of orbitals in a sublevel are determined, thus there are 7 orbitals in a f sublevel.

The aufbau principle , also called the aufbau rule, states that in the ground state of an atom or ion, electrons fill subshells of the lowest available energy, then they fill subshells of higher energy.

Passing from one element to another of the next higher atomic number, one proton and one electron are added each time to the neutral atom. The maximum number of electrons in any shell is 2n², where n is the principal quantum number. The maximum number of electrons in a subshell is equal to 2(2l + 1), where the azimuthal quantum number l is equal to 0, 1, 2, and 3 for s, p, d, and f subshells, so that the maximum numbers of electrons are 2, 6, 10, and 14 respectively.

Thus,  there are 7 orbitals in a f sublevel.

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Answer:

When the average kinetic energy of the molecules goes up (a rise in temperature), the average speed of the molecules increases. And lower average kinetic energy of the molecules means they have lower speed. When heat (energy) goes into a substance one of two things can happen:

Explanation:

If the temperature is increased, the average speed and kinetic energy of the gas molecules increase. ... If the gas volume is decreased, the container wall area decreases and the molecule-wall collision frequency increases, both of which increase the pressure exerted by the gas (Figure 1). Avogadro's law.

As the temperature of a gas decreases,  the amount of kinetic energy  also decreases .

If the temperature is increased, the average speed and kinetic energy of the gas molecules increase.

If the temperature of gas volume is decreased, the container wall area decreases and the molecule-wall collision frequency increases.

The temperature of a gas decreases and hence , results in  the amount of kinetic energy  also decreases .

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Answer:

Explanation:

First count the protons. I think there are 10 of them. That pretty much locks it in. The atom must be Neon.

All the electrons are in the first 2 rings and there are 10 all together.

Neon

Answer: It is usually separated from tea leaves by filtration. B Because the composition of the solution is uniform throughout, it is a homogeneous mixture. A Orange juice contains particles of solid (pulp) as well as liquid; it is not chemically pure.

Answer:

hope this helps!!

MOLES OF ELEMENTS IN A FORMULA

type of element. For example, in a molecule of aspirin, C9H8O4, there are 9 carbon atoms, 8 hydrogen atoms and 4 oxygen atoms. compound. For example, one mole of aspirin contains 9 moles of carbon atoms, 8 moles of hydrogen atoms and 4 moles of oxygen atoms.

Explanation:

Answer:

compressed spring

Explanation:

Answer:

The formula NH4OH is ammonium hydroxide. ... The pH of NH4OH is 11.6, so it is a base.

Explanation:

Answer:

The base chemical in the manufacture of nitric acid

Explanation:

Answer:

Inside it's usually warm so when you open a door to outside which is cold a cold front and a warm front will be exposed to each other cold will win usually since cold goes below the warm front.

Explanation:

Answer:

15:37

Explanation:

cant simplify because 37 is prime

elements are arranged by the atomic number of the element

Answer:

Density, mass of a unit volume of a material substance

Explanation:

Answer:

Hello!

Explanation:

Density: The degree of compactness of a substance.

happy to help!

Answer:

D. Two, colorless liquids are added together, and a colorless liquid and a green solid remain.

Explanation:

Two, colourless liquids are added together, and a colourless liquid and a green solid remain. Hence, option D is correct.

A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.

In the scenarios mentioned in the question, all are considered under chemical reactions.

● In the first reaction when gas is turned into a liquid and energy is released few molecules get transformed into other compounds and hence chemical change takes place.

● In the second case when two white solids are mixed in a colourless liquid the two white solids get dissolved in the colourless liquid forming a new solution which is a chemical change.

● In the third case two colourless liquids are added together and a colourless liquid and a green solid are the products of IT in this case also a chemical reaction takes place resulting in the formation of a green colour Residue.

Two, colourless liquids are added together, and a colourless liquid and a green solid remain. Hence, option D is correct.

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Answer:

the answer is C

Explanation:

Answer:

Chromium (Cr) and Copper (Cu)

Explanation:

Chromium (Cr) and Copper (Cu) have electron configurations different from what the rules predict in period 4.

Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.

The order of filling of electrons occupying the 3d subshell gets concerned in chromium and copper and because of distress in 3d subshell, these elements possess exceptional configuration.

Hence, Chromium (Cr) and Copper (Cu) have electron configurations different from what the rules predict in period 4.

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Explanation:

All matter has mass and occupies space. Volume is a measure of how much space an object occupies. ... "Mass" only depends on how much matter is in an object. "Weight", on the other hand, depends on how strongly gravity pulls on an object.

Answer:

ok

Explanation:

Which properties change the composition of a substance?

A. chemical properties

B. chemical and physical properties

C. physical properties

D. neither chemical nor physical properties

Answer:

chemical properties

Explanation:

chemical properties did change the composition of substance, so it cannot go back to original anymore, such as burning, rusting, etc.

I took the test before. I got all the answer correct and got 100% score.

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Learning Properties of Matter Quiz Unit 2 Lesson 11 Grade 8

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Answer:

solid matter is composed of tightly packed particles. A solid when we retain its shape the particles are not free to move around. liquid matter is made of more Loosely packed particles. It will take the shape of its container. Particles can move about within a liquid, but they are packed densely enough that volume is maintained. gaseous matter is composed of particles packed so loosely that it is neither a defined shape nor a Define volume. A gas can be compressed