Atomic Structure and the Periodic Table

Front

What does the nucleus of an atom contain?

Back

The nucleus of an atom contains protons and neutrons.

Front

How many neutrons does an atom of the isotope Neon-22 have?

Back

An atom of the isotope Neon-22 has 12 neutrons.

Front

The positively charged particles of an atom are the ________.

Back

The positively charged particles of an atom are the protons.

Front

How many neutrons are in C-14?

Back

C-14 has 8 neutrons.

Front

Who proposed the atomic model that includes electrons in a 'plum pudding' arrangement?

Back

The atomic model that includes electrons in a 'plum pudding' arrangement was proposed by J.J. Thomson.

Front

What is the atomic number of an element?

Back

The atomic number of an element is the number of protons in its nucleus.

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.

Front

What is the mass number of an atom?

Back

The mass number of an atom is the total number of protons and neutrons in its nucleus.

Front

What are electrons?

Back

Electrons are negatively charged subatomic particles that orbit the nucleus of an atom.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number and grouped by similar chemical properties.