Question 1

Which element is LOWER in electronegativity: Radium (Ra) or Ruthenium (Ru) ?

Accepted Answer

Radium (Ra)

Answer

Ruthenium (Ru)

Question 2

What is Chemistry?

Accepted Answer

The study of matter and the changes it undergoes

Answer

The study of mathematical equations

Answer

The study of life

Answer

The study of the galaxies and the stars within them

Question 3

How many significant figures are in the following number: 0.080020 ?

Accepted Answer

5

Answer

4

Answer

3

Answer

2

Question 4

Which scientist discovered that electrons are held in energy levels at set distances from the nucleus?

Accepted Answer

Niels Bohr

Answer

James Chadwick

Answer

J.J. Thomson

Answer

John Dalton

Question 5

How many valence electrons are in Selenium (Se)? Use the element's electron configuration to help you: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^4 ?

Accepted Answer

6

Answer

5

Answer

3

Answer

4

Question 6

Is the sublimation point of a substance a physical property or a chemical property?

Accepted Answer

Physical Property

Answer

Chemical Property

Question 7

Which element is LARGER in size: Chromimum (Cr) or Oxygen (O) ?

Accepted Answer

Chromium (Cr)

Answer

Oxygen (O)

Question 8

What is the noble gas abbreviation for Bromine (Br) ?

Accepted Answer

[Ar] 4s^2 3d^10 4p5

Answer

[Kr] 4s^2 3d^10 4p5

Answer

[Ar] 4s^2 3d^10

Answer

[He] 2s^2

Question 9

How do you find the numbe rof neutrons for an element?

Accepted Answer

Neutrons = Mass # - Atomic #

Answer

Neutrons = Atomic # / Mass #

Answer

Neutrons = Mass # + Atomic #

Answer

Neutrons = Atomic # - Mass #

Question 10

How many electrons can be identified with this set of quantum numbers: (2, 0, 1, +1/2) ?

Accepted Answer

1

Answer

3

Answer

4

Answer

2

Question 11

How many electrons are in this Nitrogen anion?

Accepted Answer

10

Answer

14

Answer

3

Answer

7

Question 12

Is pizza considered a homogeneous mixture or a heterogeneous mixture?

Accepted Answer

Heterogeneous Mixture

Answer

Homogeneous Mixture

Question 13

How many neutrons are in this Calcium cation?

Accepted Answer

20

Answer

18

Answer

40

Answer

2

Question 14

How many electrons are in this Calcium cation?

Accepted Answer

18

Answer

3

Answer

21

Answer

40

Question 15

Is ripping paper considered a physical change or a chemical change?

Accepted Answer

Physical Change

Answer

Chemical Change

Question 16

How many seconds are in 12.00 years?  Round to the correct number of significant figures.

Accepted Answer

378,400,000

Answer

248,500,000

Answer

378,000,000

Answer

145,900,000

Question 17

What is the electron configuration for Rubidium (Rb) ?

Accepted Answer

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^1

Answer

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10

Answer

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2

Answer

1s^2 2s^2 2p^6

Question 18

Which element is isoelectronic to Na^+1 ?

Accepted Answer

Neon (Ne)

Answer

Argon (Ar)

Answer

Helium (He)

Answer

Magnesium (Mg)

Question 19

What is the maximum number of electrons that the 3p sublevel can hold?

Accepted Answer

6

Answer

4

Answer

2

Answer

10

Question 20

Is roasting a marshmallow a physical change or a chemical change?

Accepted Answer

Chemical Change

Answer

Physical Change

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