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Worksheets

Atoms

Total questions: 57

Worksheet time: 39mins

Name
Class
Date
1.

Which part of an atom has a positive charge?

a)

Proton

b)

Neutron

c)

Electron

d)

None of them

2.

Which part of an atom has a negative charge?

a)

Proton

b)

Neutron

c)

Electron

d)

None of them

3.

Which part of an atom has no charge?

a)

Proton

b)

Neutron

c)

Electron

d)

None of them

4.

Using the picture from a periodic table, what is the Atomic Number?

a)

26

b)

Fe

c)

55.845

d)

56

5.

Using the picture from a periodic table, what is the Atomic Mass?

a)

26

b)

Fe

c)

55.845

d)

56

6.

Using the picture from a periodic table, what is the Mass Number?

a)

26

b)

Fe

c)

55.845

d)

56

7.

Using the picture from a periodic table, how many PROTONS are in Iron?

a)

26

b)

30

c)

55.845

d)

56

8.

Using the picture from a periodic table, how many NEUTRONS are in Iron?

a)

26

b)

30

c)

55.845

d)

56

9.

When two atoms of the same element have different masses, they are called ______, and have a different number of ______.

a)

Neutrons; Isotopes

b)

Atoms; Isotopes

c)

Isotopes; Protons

d)

Isotopes; Neutrons

10.

Calcium has the atomic number 20. If it has a mass number of 46, how many neutrons are present?

a)

46

b)

20

c)

26

d)

We cannot tell

11.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

12.

What is a representation of an ion?

a)

Li

b)

Na-22

c)

O-2

13.

What is the mass number of bromine?

a)

35

b)

45

c)

80

d)

79.904

14.

How many neutrons does this bromine atom have?

a)

35

b)

45

c)

80

15.

What type of atom is this?

a)

Neutral atom

b)

Cation

c)

Anion

d)

Isotope

16.

What two particles determine the mass number?

a)

Protons and electrons

b)

Electrons and neutrons

c)

Protons and neutrons

17.

What type of atom is this?

a)

Normal Atom

b)

Cation

c)

Anion

d)

Isotope

18.

How many neutrons does this Neon atom have?

a)

21

b)

11

c)

10

d)

12

19.
An ion forms when an atom gains or loses
a)
Protons
b)
Neutrons
c)
Electrons
20.
A neutral atom would become an ion that has a charge of 2+ by 
a)
Losing two protons
b)
Losing two neutrons
c)
Losing two electrons
21.
A positively charged ion is formed when
a)
A neutron is lost
b)
An electron is lost
c)
A neutron is gained
d)
An electron is gained
22.

Isotopes are atoms with the same number of protons but different number of (a)   .

23.

Forces that hold groups of atoms together and make them function as a unit.

(a)  

24.

When an atom gains electrons, it becomes a

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

25.

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.

26.

Valence electrons are found

a)

outermost energy level

b)

innermost energy level

c)

some where in the electron cloud

27.

How do covalent bonds form?

a)

by sharing electrons between atoms

b)

by donating or receiving electrons

28.

Ionic bonds are between

a)

metals and nonmetals

b)

2 metals

c)

2 nonmetals

29.

How are ionic bonds formed?

a)

transfer of electrons

b)

sharing of electrons

30.

Atoms involved in a covalent bond are not charged, while atoms involved in an ionic bond are charged (negative or positive)

a)

true

b)

false

31.

Classify the following molecule.

a)

polar

b)

nonpolar

32.

Why is the molecule nonpolar?

a)

There are lone pairs on the central atom.

b)

There are different types of elements bonded to the central atom.

c)

There are no lone pairs on the central atom and all of the atoms bonded to the central atom are the same.

33.

Classify the following molecule.

a)

polar

b)

nonpolar

34.

Classify the following molecule.

a)

polar

b)

nonpolar

35.

Classify the following molecule.

a)

polar

b)

nonpolar

36.

Classify the following molecule.

a)

polar

b)

nonpolar

37.

Classify the following molecule.

a)

polar

b)

nonpolar

38.

Classify the following molecule.

a)

polar

b)

nonpolar

39.

Classify the following molecule.

a)

polar

b)

nonpolar

40.
F2
a)
Polar 
b)
Nonpolar 
41.
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.
42.

The attraction that an atom has for shared electrons in bonds is

a)

electron affinity.

b)

electronegativity.

c)

electropositivity.

d)

electromagnetism.

43.

Polar molecules have

a)

no charges.

b)

slight positive and negative charges on opposite ends of the molecules.

c)

only positive charges.

d)

either positive or negative charges, but not both.

44.

Excluding the Noble gas family, where on the Periodic Table are the elements with the highest electronegativity located?

a)

upper right

b)

lower right

c)

upper left

d)

lower left

45.

Phosphorus has an electronegativity value of 2.1. Chlorine's electronegativity value is 3.0. What type of bond will these two elements form?

a)

ionic

b)

nonpolar covalent

c)

polar covalent

d)

metallic

46.

Which of the following pairs of elements is most likely to form an ionic bond? (You should refer to a Periodic table.)

a)

sulfur and oxygen

b)

sulfur and fluorine

c)

sodium and sulfur

d)

oxygen and fluorine

47.

In order to determine if a molecule is polar, you must consider the

a)

polarity of bonds and symmetry of the molecule.

b)

number of electrons and number of bonds.

c)

polarity of bonds only.

d)

total charge of each ion and number of multiple bonds.

48.

This molecule has ______ bond and is a ______ molecule.

a)

polar, nonpolar

b)

nonpolar, nonpolar

c)

nonpolar, polar

d)

polar, polar

49.

When is a molecule polar?

a)

when it is asymmetrical with at least one polar bond

b)

it is asymmetrical

c)

it is symmetrical

d)

it is symmetrical with at least one polar bond

50.

This is an example of a ____ bond.

a)

nonpolar covalent

b)

ionic

c)

polar covalent

d)

metallic

51.

Is H2S a polar or nonpolar molecule?

a)

polar

b)

nonpolar

52.

Different forms of an element that have the same number of protons but a different number of neutrons

a)

Isotope

b)

Radioisotope

c)

Chemical Reactivity

d)

Molecules

53.

What is this?

a)

Molecule

b)

Atom

c)

Chemical Reactivity

d)

Electron

54.

How many electrons can the first orbital hold?

a)

2

b)

3

c)

6

d)

8

55.

How many electons can the second orbital hold?

a)

8

b)

6

c)

2

d)

4

56.

A polar molecule is....

a)

slighly negative on one end and slightly positive on another

b)

Slightly negative on both ends

c)

Slighty positive on both ends

d)

Fully positive or fully negative

57.

A nonpolar bond is...

a)

Equally charged

b)

slightly negatve and slightly positive

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