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the atom

Total questions: 30

Worksheet time: 50mins

Name
Class
Date
1.
What atom matches this electron configuration?
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
2.

What is the charge of an atom that has gained one electron?

a)
-1
b)
-2
c)
+1
d)
+2
3.

Which would be the correct electron configuration for the Fe+4 ion?

a)

1s2 2s2 2p6 3s2 3p6 4s2 3d6

b)

1s2 2s2 2p6 3s2 3p6 4s2 3d3

c)

1s2 2s2 2p6 3s2 3p6 3d4

d)

1s2 2s2 2p6 3s2 3p6 4s1 3d6

4.

What element has this orbital notation?

a)

lithium

b)

beryllium

c)

boron

d)

carbon

5.

Which of the following is the orbital notation for oxygen?

a)
b)
c)
d)
6.

This orbital diagram is correct

a)

true

b)

false

7.
What is incorrect about this orbital diagram?
a)
Both arrows in the 2p box should be pointing up
b)
There is nothing incorrect with this diagram
c)
In the there should only be 1 orbital in the first 2p box and one in the 2nd 2p box
d)
All the arrows should be pointing up.
8.
 The diagram above represents two electrons with 
a)
a. opposite spins.
b)
 b. the same spin.
c)
c. different energies.
d)
d. different energy levels.
9.

What is a particle with one negative charge called?

a)

electron

b)

proton

c)

quark

d)

neutron

10.

What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?

a)

Neils Bohr, Ernest Rutherford, JJ Thomson, John Dalton, & Democritus

b)

JJ Thomson, John Dalton, Neils Bohr, Ernest Rutherford, & Democritus

c)

Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Neils Bohr

d)

John Dalton, Neils Bohr, JJ Thomson, Democritus, & Ernest Rutherford

11.
Ernest Rutherford discovered that the atom was mostly _________________ and has a _______________ charged nucleus.
a)
empty space, positively
b)
empty space, negatively
c)
full of protons, positively
d)
full of neutrons, negatively
12.

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

a)

6

b)

10

c)

4

d)

8

13.

Isotopes have different numbers of

a)

protons

b)

neutrons

c)

electron

d)

properties

14.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
a)
74.92 amu
b)
24.97 amu
c)
75.01 amu
d)
74.51 amu
15.

Calculate the average atomic mass of this element.

a)
106.38649amu
b)
111.91896amu
c)
107.8677amu
d)
121
16.

How many protons and electrons are present : Sr2+Sr^{2+^{ }}  

a)

Protons: 36

Electrons: 38

b)

Protons: 2

Electrons: 0

c)

Protons: 38

Electrons: 36

d)

Protons: 0

Electrons: 2

17.

What is the correct electron configuration for S2−S^{2-}  

a)

1s22s22p63s23p41s^22s^22p^63s^23p^4  

b)

1s22s22p63s21s^22s^22p^63s^2  

c)

1s22s22p63s23p61s^22s^22p^63s^23p^6  

18.

Write the symbol for an ion with 27 protons and 24 electrons

a)

Co3−Co^{3-}

b)

Cr3+Cr^{3+}  

c)

Cr3−Cr^{3-}  

d)

Co3+Co^{3+}  

19.

Which electron transition represents a gain of energy?

a)

from 2nd to 3rd shell

b)

from 2nd to 1st shell

c)

C) from 3rd to 2nd shell

d)

D) from 3rd to 1st shell

20.

Which electron configuration represents an excited state for an atom of calcium?

a)

A) 2-8-7-1

b)

B) 

2-8-7-2

c)

C) 

2-8-7-3

d)

D) 

2-8-8-2

21.

The bright-line spectrum of sodium is produced when energy is

a)

absorbed as electrons move from higher to lower electron shells

b)

absorbed as electrons move from lower to higher electron shells

c)

released as electrons move from higher to lower electron shells

d)

released as electrons move from lower to higher electron shells

22.

The diagram below represents the bright-line spectra of four elements and a bright-line spectrum

produced by a mixture of two of these elements.

Which two elements are in this mixture?

a)

A) barium and hydrogen

b)

B) 

barium and lithium

c)

C) 

helium and hydrogen

d)

D) 

helium and lithium

23.

The number of valence electrons in an atom with an electron configuration of 1s22s22p63s23p41s^22s^22p^63s^23p^4   is

                 

a)

6

b)

2

c)

16

d)

4

24.

How many valence electrons does Tin (Sn) have?

a)

8

b)

7

c)

5

d)

4

25.

This could be the dot diagram of

a)

Mg

b)

Cl

c)

C

d)

O

26.

This is a correct dot diagram for nitrogen (N)

a)

true

b)

false

27.

Ground state means that an electron is...

a)

at its lowest possible potential energy

b)

in the first shell of an atom

c)

laying low for the weekend

d)

removed from an atom

28.

What is the mass of a carbon atom that has 6 protons, 7 neutrons, and 6 electrons?

a)

6

b)

7

c)

13

d)

19

29.

An atom of tin has an atomic number of 50 and a mass number of 119. How many protons, electrons, and neutrons are found in one neutral atom of tin?

a)

50 protons, 69 electrons, 50 neutrons

b)

50 protons, 50 electrons, 69 neutrons

c)

69 protons, 50 electrons, 69 neutrons

d)

69 protons, 69 electrons, 50 neutrons

30.

How many neutrons does Mg-26 have?

a)

26

b)

12

c)

14

d)

16

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