Review Atomic Structure & Periodic Table

Front

What is the atomic number of an atom?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What happens to the properties of elements across a period in the periodic table?

Back

Across a period, the properties of elements become less like metals and more like nonmetals.

Front

What is the mass number of an atom?

Back

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

Front

What must be true for an atom to be neutral?

Back

An atom is neutral when it has the same number of protons and electrons.

Front

What does the 'A' position represent in a chemical symbol?

Back

The 'A' position represents the mass number of the atom.

Front

What is a proton?

Back

A proton is a positively charged particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A neutron is a neutral particle found in the nucleus of an atom.

Front

What is an electron?

Back

An electron is a negatively charged particle that orbits the nucleus of an atom.

Front

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

Back

The number of neutrons can be found by subtracting the atomic number from the mass number.

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 properties.