Unit B 2.1

Question 1

What is an atom comprised of?

Answer 1

Protons, neutrons and electrons

Question 2

What is the number of electrons equal?

Answer 2

Number of protons

Question 3

What is a nucleus?

Answer 3

The positively charged center of an atom. It contains protons and neutrons

Question 4

What is a proton?

Answer 4

A positively charged particle in the nucleus of an atom

Question 5

What is a neutron?

Answer 5

A neutral particle in the nucleus of an atom

Question 6

What is an electron?

Answer 6

Invisible negatively charged particles that orbit the nucleus of an atom

Question 7

What is an electron shell?

Answer 7

The orbit of electrons around the nucleus of the atom.

Question 8

Who proposed the Billiard ball model of matter?

Answer 8

John Dalton

Question 9

Who proposed the raisin bun model of matter?

Answer 9

J. J. Thompson

Question 10

Who proposed the mini planet model of matter

Answer 10

Hantaro nogoaka

Question 11

Who proposed the solar system model of matter?

Answer 11

Earnest Rutherford

Question 12

Who proposed the onion or shell or later model of matter?

Answer 12

Niels Bohr

Question 13

What model of matter do we use today in class?

Answer 13

Niels Bohr’s model of matter, Where electrons rotate and electrons shells around a positive nucleus