Free Printable Unit 3 Review- Chem

1.

Which electron configuration best matches fluorine: atomic number (Z)= 9?

a)

1s²2s²2p⁶

b)

1s²2s²2p⁵

c)

1s²2s²

d)

1s²2s⁴

2.

The general region of space where an electron is most likely to be found is known as an orbital.

a)

true

b)

false

3.

No orbital can hold more than two electrons.

a)

true

b)

false

4.

Cations are positive ions and anions are negative ions.

a)

true

b)

false

5.

The lines in the emission spectrum of hydrogen result from __________.

a)

electrons given off by hydrogen as it cools

b)

decomposing hydrogen atoms

c)

electrons given off by hydrogen when it burns

d)

energy given off in the form of visible light when an electron moves from a higher energy state to a lower energy state

6.

Of the choices below, which gives the order for decreasing ionization energies?

a)

Al > Si > S > Cl > Ar

b)

Cl > S > Al > Si > Ar

c)

Ar > Cl > S > Si > Al

7.

__________ have the lowest first ionization energies of the groups listed.

a)

Transition elements

b)

Halogens

c)

Alkaline earth metals

d)

Alkali metals

e)

Noble Gases

8.

How many p orbitals are there in a sublevel?

a)

2

b)

1

c)

4

d)

3

9.

How many electrons can the third energy level hold?

a)

18

b)

2

c)

8

d)

10

10.

Which element is depicted from this orbital diagram

a)

Fluorine

b)

Neon

c)

Chlorine

d)

Argon

11.

Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?

a)

Hund’s Rule

b)

Aufbau Principle

c)

Pauli Exclusion Principle

12.

How many electrons can the d sublevel hold?

a)

8

b)

10

c)

2

d)

4

13.

As you move down a group, atomic radius increases because -

a)

you add more and more neutrons

b)

you add more and more protons

c)

you add more and more shells (energy levels)

d)

you add more atomic mass

14.

The atom with the largest atomic radius in Period 4 (row 4) is -

a)

K

b)

Kr

c)

Fe

d)

Fe

15.

Francium (Fr) has the lowest ionization energy in Group 1 because -

a)

it has the smallest number of valence electrons

b)

it has the greatest atomic mass

c)

it has the greatest number of protons, so it attracts its electrons the strongest

d)

its 1 valence electron is very far from the nucleus, so little energy is needed to remove it

16.

Of the halogens, which has the smallest radius?

a)

F

b)

Br

c)

He

d)

At

17.

Which of the following will have a lower ionization energy than Scandium (Sc)?

a)

Helium (He)

b)

Titanium (Ti)

c)

Calcium (Ca)

d)

Magnesium (Mg)

18.

What is a vertical (up and down) column in the periodic table?

a)

group or family

b)

period

c)

periodic law

d)

octet rule

19.

Which element in period 4 has the highest electronegativity?

a)

potassium

b)

calcium

c)

copper

d)

bromine

20.

Which property determines an atom's ability to attract electrons shared in a chemical bond?

a)

ionization energy

b)

atomic radius

c)

electronegativity

d)

ionic radius

21.

Which periodic group has the smallest atomic radius?

a)

Alkali metals

b)

Halogens

c)

Noble Gases

d)

Transition metals

22.

Which of the following has the largest electronegativity value?

a)

neon

b)

fluorine

c)

carbon

d)

lithium

23.

Which of the following is a transition metal?

a)

Iron

b)

Oxygen

c)

Neon

d)

Barium

24.

Which of the following is the most reactive group of metals?

a)

Alkali

b)

Alkaline Earth

c)

Halogen

d)

Transition Metals

25.

Which of the following is the most reactive group of non-metals?

a)

Alkali

b)

Alkali Earth

c)

Halogen

d)

Noble Gas

26.

The elements in this family are soft, silvery, and very reactive with water.

a)

Alkaline Earth Metals

b)

Alkali Metals

c)

Transition Metals

d)

Lanthanides

27.

All elements in the same GROUP have the same number of ___.

a)

protons

b)

neutrons

c)

atomic mass units

d)

valence electrons

28.

This could be the dot diagram of

a)

Ne

b)

Si

c)

Al

d)

Be

29.

What color of light has the greatest energy per photon?

a)

Red

b)

Green

c)

Blue

d)

Violet

30.

True or False: The ground state is the highest energy state of an atom.

a)

True

b)

False

31.

For an electron to change from ground state to an excited stated it must...

a)

Absorb energy

b)

Release energy

32.

Line emission spectrum shown below happens when

a)

Electron transition from lower to higher energy level.

b)

Electron transition from higher to lower energy level.

c)

Electron exist in fixed energy states

d)

Electron transition between different energy levels.

33.

What gases are in the unknown mixture?

a)

Gas B & Gas D

b)

Gas C & Gas B

c)

Gas A & Gas D

d)

Gas D & Gas C

34.

What is the amount of energy carried by light with a frequency of $2.9\times10^{14}\ Hz$ ?

a)

$1.9\times10^{-19}\ J$

b)

$6.6\times10^{-34}\ J$

c)

$6.0\times10^{-18}\ J$

d)

$1.8\times10^{-20}\ J$

35.

What is the frequency of red light? ( $\lambda=700\times10^{-9}\ m$ )

a)

$6.67\times10^{-11}\ Hz$

b)

$7.00\times10^{-7}\ Hz$

c)

$4.29\times10^{14}\ Hz$

d)

$4.82\times10^{15}\ Hz$

36.

What is the amount of energy carried by light with a wavelength of $600\times10^{-9}\ m$ ? (Hint: You will need to use both equations)

a)

$6.67\times10^{-11}\ J$

b)

$3.31\times10^{-19}\ J$

c)

$8.21\times10^{-20}\ J$

d)

$5.00\times10^{14}\ J$

Unit 3 Review- Chem

Total questions: 36

Worksheet time: 46mins

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