Atomic Structure - Chapter 4

Question 0

What is a POSITIVELY charged subatomic particle?

Answer 0

Proton

Question 1

What is a subatomic particle in the nucleus of the atom with NO change?

Answer 1

Neutron

Question 2

What are the smallest particles of an element that retains its identity in a chemical reaction?

Answer 2

Atom

Question 3

What is a NEGATIVELY charged subatomic particle?

Answer 3

Electron

Question 4

What are atoms with the same number of protons but different numbers of neutrons?

Answer 4

Isotopes

Question 5

What is the number of protons in the nucleus of an element called?

Answer 5

Atomic number

Question 6

What is 1/12 the mass of a carbon 12 atom?

Answer 6

Atomic Mass Unit

Question 7

What is the weighted average mass of the atom in a naturally occurring sample of an element?

Answer 7

Atomic Mass

Question 8

What is the total number of protons and neutrons in the nucleus of the atom?

Answer 8

Mass number

Question 9

What is true about the nucleus of an atom?
A. Negatively charged, low density
B. Positively charged, low density
C. Positively charged, high density

Answer 9

C. Positively charged, high density

Question 10

Which one is NOT part of Dalton’s atomic theory?
A. Atoms are always in motion
B. All elements are composed of atoms
C. Atoms of the same element are alike

Answer 10

A. Atoms are always in motion

Question 11

What do scientists KNOW about about atoms?
A. Dalton’s theories are correct
B. Atoms of an element can have different numbers of protons
C. Atoms are all divisible

Answer 11

C. Atoms are all divisible

Question 12

How can you calculate the number of neutrons in the nucleus of an atom?
A. Add the electrons and protons
B. Subtract the protons from the mass number
C. Add the mass number to the protons

Answer 12

B. Subtract the protons from the mass number

Question 13

What is the SUM of protons and neutrons in an atom?
A. Mass number
B. Atomic number
C. Mass

Answer 13

A. Mass number

Question 14

Which is a FALSE statement?
A. Electrons have a mass of 1 amu
B. Electrons have a negative charge
C. The nucleus of an atom has a positive charge

Answer 14

A. Electrons have a mass of 1 amu

Question 15

What does the number 80 in Bromine represent?
A. The Mass Number
B. The sum of protons and electrons
C. The Atomic Number

Answer 15

C. The Atomic Number

Question 16

If an atom of an element has an atomic number of 45 and a mass number of 125 - how many protons, electron and neutrons does it have?

Answer 16

Protons - - 45
Electrons - - 45
Neutrons - - 80

Question 17

How do the two isotopes - hydrogen 2 and hydrogen 3 differ?
A. Hydrogen 3 has 2 neutrons
B. Hydrogen 2 has 2 protons
C. Hydrogen 2 has 0 protons

Answer 17

A. Hydrogen 3 has 2 neutrons

Question 18

Be able to fill in proton, neutron, and electron chart
Proton - charge - symbol - mass
Neutron - charge - symbol - mass
Electron - charge - symbol - mass

Answer 18

Proton - charge (+) - symbol (p+) - mass (1 amu)
Neutron - charge (0) - symbol (N*) - mass (1amu)
Electron - charge (-) - symbol (e-) - mass (1/1840 amu

Question 19

Be able to draw Thomson’s atom
Be able to draw Rutherford’s atom
Be able to draw Rutherford’s Gold Foil Experiment

Answer 19

Use your notes