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uysha [10]
3 years ago
15

Each element in the periodic table is assigned an atomic number. This number is the same as?

Chemistry
2 answers:
igor_vitrenko [27]3 years ago
3 0
The number of protons in the nucleus
frozen [14]3 years ago
3 0

Answer: Number of protons inside the nucleus.

Explanation: The atomic number is indicated by the amount of positively charged particles in the nucleus of an atom and these positively charged subatomic particles are protons.

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The energy needed to remove an electron from an atom is called
Arlecino [84]

Ionization energy, also called ionization potential, in chemistry, the amount of energy required to remove an electron from an isolated atom or molecule

3 0
3 years ago
How many moles of NO gas are formed from 2.25 moles of nitrogen?
VikaD [51]

Hey there!

A mole is measured in atoms, molecules, particles. It's kind of a loose sort of measurement, just unit of the substance.

Since there is a ratio of 1 to 1 nitrogen to oxygen, there will be the same amount of molecules as atoms of nitrogen.

2.25 moles of NO gas are formed from 2.25 moles of nitrogen.

Hope this helps!

7 0
3 years ago
What is the volume of 18.9 g of a liquid that has a density of 0.956 g/ml
Alex_Xolod [135]
The volume is 19.76987448 by taking the known variables mass=18.9g and density=0.956g/ml
To get volume you divide the mass by the density which gives you about
19.77 ml in volume
6 0
3 years ago
Which answer correctly ranks the atoms in terms of decreasing electronegativity (the highest electronegativity first)? which ans
Degger [83]

Answer:

O, N, C, H

Explanation:

Electronegativity of an element is the property that combines the ability of its atom to lose or gain electrons. It measures the relative tendency with which the atoms of the element attracts valence electrons in a chemical bond.

On the periodic table, Electronegativity increases across the period but decreases down a group.

To solve the given problem, let us use thE Pauling's table of electronegativities to compare the electronegativities of the elements.

On the table:

C = 2.5

H = 2.1

O = 3.5

N = 3.0

In terms of decreasing electronegativities, the atoms are arranged as:

O N C H

4 0
3 years ago
Explain using the kinetic molecular theory what happens to the water molecules when changing from liquid to gas
gogolik [260]

Answer:

If the molecules are heated further, the liquid water will become water vapor, which is a gas. Gas particles have more energy and are on average at distances from each other which are much larger than the size of the atoms/molecules themselves.

4 0
3 years ago
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