Science Ch. 7

Question 1

Thompsons experiments led to the discovery of

Answer 1

Electrons

Question 2

For an atom to be neutral, the number of protons has to be equal to the number of

Answer 2

Electrons

Question 3

The mass of a ______ is about equal to the number of proton

Answer 3

Neutron

Question 4

An element can be identified by the number of

Answer 4

Protons

Question 5

Every atom of the same element has the same

Answer 5

Atomic number

Question 6

3 basic components of an atom

Answer 6

Protons, Neutrons, and electrons

Question 7

Individual that determined cathode rays are negatively charged

Answer 7

J.J Thompson

Question 8

The atoms nucleus’ consists of

Answer 8

Protons and Neutrons

Question 9

A _____ represents Daltons mental image of an atom

Answer 9

Marble

Question 10

A _______ represents Thompsons mental image of an atom

Answer 10

Chocolate chip cookie

Question 11

Rutherford concluded that atoms are mostly

Answer 11

Empty space

Question 12

A certain atom had 21 protons, 21 neutrons, and 24 electrons. It’s mass (p+n)=

Answer 12

45

Question 13

If 2 atoms have the same number of protons, but different number of neutrons, they have the same

Answer 13

Atomic number

Question 14

Protons and Neutrons have almost the same

Answer 14

Mass

Question 15

Which has the least mass? Protons, Neutrons, or Electrons?

Answer 15

Electrons

Question 16

Who invented the element symbols??

Answer 16

John Dalton

Question 17

Chlorine (mass 35) and Chlorine (mass 37) have a different number of

Answer 17

Neutrons

Question 18

Most of the atoms mass is located in

Answer 18

The nucleus

Question 19

What individual said that most of an atom is empty space??

Answer 19

Ernest Rutherford

Question 20

Atoms of the same element containing different numbers of neutrons are called

Answer 20

Isotopes

Question 21

J.J Thompson used the cathode ray to discover the

Answer 21

Electrons

Question 22

This individual placed electrons into specific energy levels

Answer 22

Niels Bohr

Question 23

Learn how to distribute energy levels (you better or else)

Answer 23

Alr