Periodic Table

Front

How many electrons does oxygen have?

Back

8

Front

The atomic mass of Boron is 10.81, which means Boron has...

Back

6 neutrons and 5 protons, each weigh 1 amu.

Front

How many neutrons does lithium have?

Back

4

Front

What is the atomic number of iron?

Back

26

Front

A proton has what charge?

Back

Positive

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 the atomic mass?

Back

It represents the average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What are isotopes?

Back

Atoms of the same element that have different numbers of neutrons.

Front

What is the periodic law?

Back

The properties of elements are a periodic function of their atomic numbers.

Front

What does the term 'valence electrons' refer to?

Back

Electrons in the outermost shell of an atom that are involved in chemical bonding.