Chemistry Review - Assessment

1.

Multiple Choice

1 min

1 pt

Which of the following is described as the basic unit of matter?

Element

Atom

Molecule

Compound

2.

Multiple Choice

30 sec

1 pt

In the atom diagram shown, E is pointing to

An electron

a proton

a neutron

the nucleus

3.

Multiple Choice

30 sec

1 pt

In the atom diagram shown, A is pointing to the darker particles, these are known as

electrons

protons

neutrons

the nucleus

4.

Multiple Choice

30 sec

1 pt

B and C are found in the ______ of an atom.

electron cloud

Space

Nucleus

Outside

5.

Multiple Choice

30 sec

1 pt

What charge does an electron have?

Negative

Positive

Neutral

Contrated

6.

Multiple Choice

1 min

1 pt

Which of the following is found in the nucleus of an atom?

electrons

neutrons

The center of an atom, composed of protons and neutrons

molecules

7.

Multiple Choice

1 min

1 pt

In this chemical equation, the elements in red are the_______.

Products

Reactants

Subscripts

Coefficients

8.

Multiple Choice

1 min

1 pt

What is the atomic mass of this atom?

1

3

4

7

9.

Multiple Choice

30 sec

1 pt

What is the atomic number of this atom?

4

5

9

none of the above

10.

Multiple Choice

30 sec

1 pt

What is a valence electron?

an electron that is found in the outermost orbital of an atom.

an electron found in the innermost orbital of an atom.

an electron found in the middle orbital.

11.

Multiple Choice

1 min

1 pt

An ionic bond forms when

valence electrons are shared back and forth (move between) two atoms.

a sea of mobile electrons surround the cations and they then become negativly charged

valence electrons are transferred from one atom to another, forming charged ions that are then pulled together by attraction between opposite charges

none of the above

12.

Multiple Choice

3 mins

1 pt

Covalent bonds form when

the electronegativity difference between two atoms is very large.

electrons are completely transferred between two atoms.

pairs of electrons are shared between two atoms.

ions are held together by opposite charges.

13.

Multiple Choice

30 sec

1 pt

Why type of bond is forming between the atoms in the diagram?

Ionic

Covalent

14.

Multiple Choice

1 min

1 pt

Is this image an example of covalent bonding?

Yes

No

15.

Multiple Choice

30 sec

1 pt

Using the information provided, determine how many electrons the a Boron atom contains.

2.5

5

6

10.81

16.

Multiple Choice

3 mins

1 pt

What type of bond is forming between oxygen and hydrogen?

Ionic

Covalent

17.

Multiple Choice

30 sec

1 pt

How many protons does this atom have?

2.5

6

5

10.811

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