Atomic Theory and Periodic Practice December 11

Front

James Chadwick discovered the ________.

Back

neutron

Front

The vertical (up and down) columns in the Periodic Table are called ________.

Back

groups

Front

All matter is made of ________.

Back

atoms

Front

'Everything is composed of atoms' was stated by ________.

Back

Democritis

Front

He developed the planetary model of the atom. Who is he?

Back

Bohr

Front

What is the smallest unit of an element that retains its properties?

Back

atom

Front

What are the three main subatomic particles?

Back

protons, neutrons, electrons

Front

What is the charge of a proton?

Back

positive

Front

What is the charge of a neutron?

Back

neutral

Front

What is the charge of an electron?

Back

negative