Electron configuration, light, and periodic table

A particle with a charge is called

What element is this?

Some helium atoms are different from other helium atoms.

Which of the following is NOT a valid excited-state electron configuration for nitrogen?

Electrons emit light with distinctive color when the electrons absorb energy.

Why are Mr. Gillette's chemistry jokes so bad?

Calcium (Ca), below, will probably react like the element

What is the smallest piece of an element which is still that element?

The neutron was the first subatomic particle discovered

Which of these is a valid ground-state electron configuration for nitrogen?

Elements give off light of a distinctive color when the

Elements in the same column, with the same ending on their electron configuration (like 3s¹ , 4s¹ and 5s¹) will

These colors are produced by electrons releasing light as they

Which can hold the most electrons?