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Mega Unit 5

Total questions: 50

Worksheet time: 41mins

Name
Class
Date
1.

The positive particles of an atom are ___________.

a)

electrons

b)

protons

c)

neutrons

2.

The center of an atom where its neutrons and protons are is called the _____________.

a)

nucleus

b)

electron cloud

c)

center

3.
An atom is made up of protons, neutrons, and electrons.  Which is the smallest subatomic particle?
a)
Proton
b)
Neutron
c)
Electron
d)
Idontknowatron
4.
Each row in a periodic table is called a 
a)
Group
b)
Period
c)
Row
d)
Column
5.
Each column in the periodic table is called a 
a)
period
b)
group
c)
cluster
d)
unit
6.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
7.
Which is an electron?
a)
A
b)
B
c)
C
8.

UP and DOWN columns on the periodic table are

a)

groups

b)

periods

9.

SIDE TO SIDE rows on the periodic table are

a)

groups

b)

periods

10.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
11.
What is the mass number and name of an element with 8 protons and 8 neutrons?
a)
16 - Carbon
b)
16 - Oxygen
c)
24 - Oxygen
d)
8 - Neon
12.

USE THE PERIODIC TABLE

How many valence electrons does Phosphorus have?

a)

31

b)

5

c)

15

d)

4

13.

What element would have the same number of shells as Sodium?

a)

Nitrogen

b)

Oxygen

c)

Magnesium

d)

Helium

14.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
15.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
16.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
17.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
18.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
19.
Number of C's in 2Na₂CO₃
a)
1
b)
2
c)
3
d)
5
20.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
21.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
22.
Balance this equation:
 2Li + Cl2 -> LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
23.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
24.
Is the following equation balanced or unbalanced ? 
Al + O2 --> Al2O3
a)
Balanced
b)
Unbalanced
25.
How many Oxygens are in this molecule? 
(OH)2
a)
4
b)
1
c)
2
d)
3
26.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
27.

What elements generally make an ionic bond ?

a)

Metal and nonmetal

b)

2 or more nonmetals

c)

2 or more metals

d)

2 elements

28.

An ionic bond is formed when

a)

Valence electrons are shared.

b)

Valence electrons surround the cations.

c)

Valence electrons are transferred between atoms.

d)

Valence electrons are completely transferred between two metals.

29.

What is a valence electron?

a)

an electron that is found in the outermost shell of an atom

b)

an electron found in the innermost shell of an atom

c)

an electron found in the middle shell

d)

an electon found in the nucleus

30.

What is the number of valence electrons of Oxygen?

a)

1

b)

2

c)

6

d)

8

31.

What is the number of valence electrons of Neon?

a)

6

b)

7

c)

8

d)

9

32.
How do covalent bonds form?
a)
Donating & receiving valence e- between atoms.
b)
Opposite slight charges attract each other between compounds.
c)
Scientists are still not sure how they form.
d)
Sharing valence e- between atoms.
33.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
34.

Why don't noble gases form bonds?

a)

Noble gases do form bonds

b)

They all have a full octet

c)

They only bond with each other

35.

Why do all bonds form?

a)

to fill the outermost energy level

b)

so an atom can be unstable

c)

so the number of protons and electrons can equal.

d)

so they can gain neutrons.

36.

Valence electrons are found

a)

outermost energy level

b)

innermost energy level

c)

some where in the electron cloud

37.

An atom with 1 valence electron 'needs' a full shell, so it can either gain 7 electrons or lose 1. Which is more likely to occur?

a)

nothing

b)

gain 7

c)

lose 1

38.

When an atom loses an electron, it becomes a

a)

positive ion

b)

negative ion

39.

Atoms are most stable when their outer shell is full or complete.

a)

true

b)

false

40.

How are ionic bonds formed?

a)

transfer of electrons

b)

sharing of electrons

41.

Group numbers on the periodic table help us determine

a)

number of valence electrons

b)

state of the element (solid, liquid, gas)

42.

Water is an example of what?

a)

molecular compound (covalent compound)

b)

ionic compound

43.

Salt is an example of what?

a)

ionic compound

b)

covalent compound

44.

If an atom has no charge, which of the following must be true?

a)

It has more neutrons than protons or electrons.

b)

There are only neutrons inside the atom.

c)

Its number of protons is equal to its number of electrons.

d)

The neutrons in the atom outnumber the electrons and protons.

45.

How many atoms of hydrogen are in

C6H12O6

a)

6

b)

12

c)

18

d)

2

46.

Calculate the number of Oxygen atoms in Al(OH)3

a)

1

b)

2

c)

3

d)

4

47.

How many different elements are present in H2COCH2

a)

5

b)

4

c)

3

d)

2

48.

How many total POTASSIUM atoms are in this formula?

a)

8

b)

2

c)

4

d)

12

49.

How many elements are in this chemical formula? NaHCO3NaHCO_3  

a)

1

b)

2

c)

3

d)

4

50.

C3H5(NO3)3

a)

C = 3, H = 5, N = 3, O = 9

b)

C = 3, H = 5, N = 1, O = 9

c)

C = 9, H = 15, N = 3, O = 9

d)

C = 9, H = 15, N = 1, O = 3

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