Electrons are

Neutrons are

An atom is

An ion is a

Which of the particles in an atom has a negligible mass?

Each isotope has a different

An atom of lithium has 3 protons, its nucleon number is 7.

How many electrons does it have

An atom of lithium has 3 protons, its nucleon number is 7.

How many neutrons does it have

Radioactive isotopes are

Name the element from the electron distribution

Name the atom with these electron distribution

Carbon is found in group

Neon is found in period

All elements in group 1 have

Carbon has 3 isotopes :

₆C¹² ₆C¹³ ₆C¹⁴

How many neutrons does each have respectively?

The symbol Z represents the

The symbol A represents the

To calculate the number of neutrons, we subtract

You can identify an atom by its

Metals make a ringing noise when stuck. They are

Metals are drawn out to make wires. They are

Metals form

Metals react with oxygen to form

Metals are _________conductors of heat and electricity

Non metals form

Non metals are

Non metals are

Carbon is a

Lithium is a