Basic Chemistry

Front

What group number is Beryllium in?

Back

Group 2

Front

How many valence electrons do noble gases have?

Back

8

Front

How do you calculate the number of neutrons in an atom?

Back

Subtract the atomic number (protons) from the atomic mass.

Front

What does the coefficient in a chemical formula represent?

Back

The number of molecules or atoms of a substance in a reaction.

Front

If an atom has 6 protons, 6 neutrons, and 7 electrons, what is its atomic mass?

Back

12 (atomic mass is the sum of protons and neutrons).

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms.

Front

What is the difference between an atom's atomic mass and its atomic weight?

Back

Atomic mass is the mass of a single atom, while atomic weight is the average mass of an element's isotopes.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the atomic mass and stabilize the nucleus.

Front

What are isotopes?

Back

Atoms of the same element with different numbers of neutrons.