Atoms & Periodic Table

Front

Who proposed the 'Plum Pudding' model of the atom?

Back

J.J. Thomson

Front

What are the positively charged particles in the center of the atom called?

Back

Protons

Front

What are the elements located on the stairstep of the periodic table called?

Back

Metalloids

Front

What is the atomic mass of an element with 11 protons and 11 neutrons?

Back

22

Front

How do you calculate the atomic mass of an atom?

Back

Add the number of protons and neutrons.

Front

What is the charge of an electron?

Back

Negative

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of a neutron?

Back

Neutral

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What are isotopes?

Back

Atoms of the same element with different numbers of neutrons.