Atomic Structure

Front

What determines the identity of an element?

Back

The number of protons in the nucleus.

Front

What is the central region of an atom where its neutrons and protons are located?

Back

The nucleus.

Front

What is the atomic number of an atom with 9 protons?

Back

9.

Front

How are elements arranged in the modern periodic table?

Back

By atomic number.

Front

What is an isotope?

Back

Any of two or more forms of an element with the same number of protons in the nucleus but different numbers of neutrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the mass of a proton compared to a neutron?

Back

Approximately equal.

Front

What is the electron cloud?

Back

The region around the nucleus where electrons are likely to be found.