Atomic Theory and Structure

Question 1

Who first placed electrons at specific energy levels around the nucleus?

Accepted Answer

Neils Bohr

Question 2

In this element, the most likely mass number is:

Accepted Answer

115

Question 3

What kind of charge do electrons have?

Accepted Answer

negative

Question 4

In this element, the chemical symbol is:

Accepted Answer

In

Question 5

What is the mass number of this atom?

Accepted Answer

19

Question 6

Where are protons located?

Accepted Answer

Nucleus

Question 7

If an atom contains 14 protons, 14 neutrons, and 14 electrons, it's mass number is:

Accepted Answer

28

Question 8

The innermost energy level holds a maximum of how many electrons?

Accepted Answer

2

Question 9

What kind of charge do neutrons have?

Accepted Answer

no charge

Question 10

What is the atomic number of this atom?

Accepted Answer

9

Question 11

In this element, the atomic mass is:

Accepted Answer

114.82

Question 12

How many protons are in this atom?

Accepted Answer

9

Question 13

Atomically, the difference between hydrogen and helium is:

Accepted Answer

the number of protons in the nucleus

Question 14

How many electrons are in this atom?

Accepted Answer

9

Question 15

The number of protons in the nucleus is the:

Accepted Answer

atomic number

Question 16

The outermost energy level of atoms can hold a maximum of how many electrons?

Accepted Answer

8

Question 17

Which of the following is NOT part of John Dalton's atomic theory?

Accepted Answer

the nucleus of atoms can be split to release energy

Question 18

Which scientists discovered the proton by firing particles at gold foil?

Accepted Answer

Lord Rutherford

Question 19

How many neutrons are in this atom?

Accepted Answer

10

Question 20

In this element, the atomic number is:

Accepted Answer

49

Question 21

Which scientist discovered the electron using gas discharge tubes?

Accepted Answer

JJ Thompson

Question 22

Which of the following is different for two isotopes of carbon?

Accepted Answer

number of neutrons

Question 23

The weighted average of all isotopes based on relative abundance (decimal number) is the:

Accepted Answer

atomic mass

Question 24

Which of the following are found IN the nucleus of atoms?

Accepted Answer

Protons and Neutrons

Question 25

The subatomic particle that is located outside of the nucleus is the:

Accepted Answer

electron

Question 26

Add the actual number of protons and neutrons together to get the:

Accepted Answer

mass number

Question 27

What kind of charge do protons have?

Accepted Answer

positive

Atomic Theory and Structure

Questions 27

Atomic Theory and Structure

Questions 27