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Atomic structure and isotope-AH

Total questions: 40

Worksheet time: 31mins

Name
Class
Date
1.

Atoms of elements that are in the same group have the same number of

a)

protons.

b)

neutrons.

c)

valence electrons.

d)

protons and neutrons.

2.

Which of the following elements is an alkali metal?

a)

calcium

b)

magnesium

c)

mercury

d)

sodium

3.

In Mendeleev's periodic table, elements in each column had similar

a)

atomic masses.

b)

properties.

c)

atomic numbers.

d)

symbols.

4.

Each column of the periodic table is

a)

an element.

b)

a group.

c)

an isotope.

d)

a period.

5.

The order of elements in the modern periodic table is based on an element's

a)

atomic number

b)

proton number

c)

chemical symbol

d)

atomic mass

6.

Which statement about the alkali metals is correct?

a)

They are located in the left-most column of the periodic table.

b)

They are extremely nonreactive.

c)

They are usually gases.

d)

They form negative ions with a 1- charge.

7.

Metals tend to be

a)

gases.

b)

dull.

c)

brittle.

d)

good conductors.

8.

Which group is very stable due to the fact that they have a full outermost energy level?

a)

alkali metals

b)

halogens

c)

alkaline-earth metals

d)

noble gases

9.

Which of the following is a property of group 18 elements?

a)

malleable

b)

brittleness

c)

high electrical conductivity

d)

unlikely to react with other elements

10.

Based on its location on the periodic table, which of these elements most likely has physical and chemical properties most similar to boron (B)?

a)

magnesium (Mg)

b)

aluminum (Al)

c)

neon (Ne)

d)

chlorine (Cl)

11.

Which of the following groups on the Periodic Table is likely to form positively charged ions (or cations)?

a)

group 1

b)

group 13

c)

group 17

d)

group 18

12.

Which of the following elements would most likely be a shiny, gray-colored solid at room temperature, conduct electricity, and dent when hit with a hammer?

a)

argon (Ar)

b)

chlorine (Cl)

c)

sulfur (S)

d)

aluminum (Al)

13.

Rows on the periodic table are called...

a)

groups

b)

periods

c)

families

d)

shells

14.

Which group has elements with a full valence shell?

a)

Group 1

b)

Group 2

c)

Group 15

d)

Group 18

15.
Use the periodic table to identify which element is located in group 17 and period 6
a)
Fr
b)
Ar
c)
At
d)
C
16.
Use the periodic table to identify which element is located in period 4 and group 7.
a)
Mn
b)
Rf
c)
Be
d)
Fe
17.

What family of elements does Arsenic belong to?

a)

Group 14

b)
Period 4
c)
Metalloids
d)
Non-metals
18.
What group number are the alkaline earth metals in on the periodic table?
a)
1
b)
12
c)
2
d)
15
19.

1. An atom has an atomic number of 12 and a mass number of 25. The number of electrons in the atom is

a)

12

b)

13

c)

25

d)

37

20.

What is the atomic number of this Lithium?

a)

1

b)

3

c)

4

d)

7

21.

What is the mass number of Lithium?

a)

1

b)

3

c)

4

d)

7

22.
In order for an atom to be neutral what has to be true?
a)
The atom has more protons than neutrons
b)
The atom has more neutrons than protons
c)
The atom has the same number of protons and neutrons
d)
The atom has the same number of protons and electrons
23.
Which subatomic particles contribute the most to the mass of an atom?
a)
Protons, Neutrons, Electrons
b)
Protons only
c)
Protons and Electrons
d)
Protons and Neutrons
24.
Where is most of the mass in an atom located?
a)
in the nucleus
b)
in the protons
c)
in the neutrons
d)
in the electrons
25.

Which of the following determines the identity of an element?

a)

number of protons

b)

atomic mass

c)

number of neutrons

d)

number of shells

26.
If the number of electrons in an atom changes you make a(n) __________________.
a)
ion
b)
isotope
c)
new element
d)
isomer
27.
How many neutrons does uranium-239 have
a)
92
b)
147
c)
239
d)
331
28.
Which statement about subatomic particles is true?
a)
Protons, neutrons, and electrons all have about the same mass.
b)
Unlike protons or neutrons, electrons have no mass.
c)
Neutrons have no charge and no mass.
d)
An electron has far less mass than either a proton or neutron.
29.
Two isotopes of carbon are carbon-12 and carbon-14.  These isotopes differ from one another by two protons.
a)
true
b)
false
30.
What is the charge of an atom that has lost one electron?
a)
1-
b)
2-
c)
1+
d)
2+
31.
The only element with no neutrons in its nucleus.
a)
Oxygen
b)
Helium 
c)
Hydrogen
d)
Lithium
32.
If an atom of nickel has a charge of +3, how many electrons does the atom have?
a)
28
b)
25
c)
26
d)
31
33.
If an atom of oxygen has a charge of -2, how many electrons does the atom have?
a)
18
b)
6
c)
8
d)
10
34.
How many neutrons would V-49 have?
a)
26
b)
49
c)
23
d)
50.94
35.
Which of the following could have 82 neutrons?
a)
W-182
b)
Ta-181
c)
Cs-132
d)
Ba-138
36.
Ions are: 
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
37.

What is the correct hyphen notation name for the isotope with 19 electrons and 21 neutrons?

a)

Potassium-40

b)

Scandium-19

c)

Potassium-21

d)

Scandium-40

38.

In the following pair, are they isotopes or different elements.

Element x has 27 protons and 82 neutrons.

Element y has 27 protons and 83 neutrons.

a)

isotopes of same element

b)

different elements

39.
What is the structure of a krypton-85 atom?
a)
36 electrons, 36 protons, and 49 neutrons
b)
49 electrons, 49 protons, and 49 neutrons
c)
49 electrons, 49 protons, and 85 neutrons
d)
36 electrons, 36 protons, and 85 neutrons
40.

An element has three isotopes. Given the abundances and relative masses, calculate the average atomic mass and determine (from the periodic table) which element it is.


Abundances | Relative masses

0.005% | 234.04 amu

0.720% | 235.04 amu

99.275% | 238.05 amu

a)

Uranium (#92, Atomic Mass: 238.03 amu)

b)

Fluorine (#9, Atomic Mass: 19.00 amu)

c)

Mercury (#89, Atomic Mass: 200.59 amu)

d)

Polonium (#84 209 amu)

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