Front

Beryllium is in group number______.

Back

Group 2

Front

Which particles make up the nucleus of an atom?

Back

Protons and neutrons.

Front

Which one of the following discoveries came first?

Back

Atoms.

Front

What is a particle with one negative charge called?

Back

Electron.

Front

What is the number of protons that the element in this image contain?

Back

7.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What are isotopes?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the periodic table?

Back

A tabular arrangement of elements based on their atomic number and properties.

Front

What does the group number in the periodic table indicate?

Back

The number of valence electrons in the outer shell of the elements.