Atomic Structure Test

Question 1

Who discovered that the center of the atom was small and dense with a positive charge at the center?

Answer 1

Rutherford

Question 2

The sub atomic particle with a positive charge is called the

Answer 2

Proton

Question 3

Mass Number

Answer 3

The number of protons and neutrons

Question 4

What charge do Electrons have?

Answer 4

Negative

Question 5

Atoms of different elements will be

Answer 5

Different

Question 6

Atomic mass

Answer 6

The average of the isotopes in the element

Question 7

What is found in the Atom’s Nucleus

Answer 7

Protons and Neutrons

Question 8

Atomic Number

Answer 8

The number of protons in the element

Question 9

What is the AMU of a proton

Answer 9

1

Question 10

Who discovered the electron

Answer 10

JJ Thompson

Question 11

Who conducted the cathode ray experiment?

Answer 11

JJ Thompson

Question 12

Isotope

Answer 12

Atoms with the same atomic number but different mass numbers

Question 13

Who is Democritus

Answer 13

Greek Philosopher who first thought of the Atom

Question 14

What is an anion

Answer 14

An atom with a negative charge

Question 15

What is a cation

Answer 15

An atom with a positive charge

Question 16

How does an atom gain a positive charge?

Answer 16

Losing electrons

Question 17

What are the 4 major points of Daltons theory?

Answer 17

All elements are Made of different elements
All things made of atoms
Atoms can change through physical reactions
Chemical reactions occur when atoms change

Question 18

How did Thompson know the particle he discovered was negative?

Answer 18

The negative protons were reflected