Free Printable Unit 2 Review

Worksheets

Unit 2 Review

Total questions: 27

Worksheet time: 1hrs 18mins

Name

Class

Date

What atom matches this electron configuration?
1s²2s²2p⁶3s²

Neon

Magnesium

Aluminum

Potassium

Which is the electron configuration for an oxygen atom in the ground state?

1s²2s²2p⁶3s²3p⁶4s²

1s²2s²2p⁴

1s²2s²2p⁶

1s²2s²2p⁶3s²3p⁶

How many valence electrons are represented here?

What is the noble gas notation for a Sulfur atom in the ground state?

[Ar] 3p⁴

[He] 3s²3p⁴

[Ne] 3s²3p⁴

[Na] 3s²3p³

What element has the valence shell configuration
3s² 3p²

Which element is pictured?

neon

fluorine

magnesium

argon

Identify the element in Period 5 that has 1 valence electron?

which has the least atomic mass

protons

neutrons

electrons

What scientist is best known for his "Plum Pudding" model of the atom?

J.J. Tomson

Ernest Rutherford

John Dalton

Democritus

10.

What does the nucleus of an atom contain?

Electrons and neutrons

Protons and neutrons

Neutrinos and positrons

DNA and RN

11.

What were J. J. Thomson's three contributions to the atomic theory?

Discovered the electron

Discovered the nucleus -did the gold foil experiment

Used the cathode ray tube in his discovery

Created a model of the atom with electrons moving around the nucleus in fixed orbits

Created the "plum pudding" model of the atom

12.

What were Ernest Rutherford's three contributions to atomic theory?

Discovered that the atom is mostly empty space

Discovered the nucleus- did the gold foil experiment

Used the cathode ray tube in his discovery

Discovered the electron

Discovered that the proton had a positive charge

13.

Which of the following will have a larger radius than Zinc?

Gallium

Aluminum

Magnesium

Strontium

14.

Which of the following will have a higher electronegativity than arsenic (As)?

Carbon (C)

Neon (Ne)

Antimony (Sb)

Germanium (Ge)

15.

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

Helium (He)

Titanium (Ti)

Calcium (Ca)

Magnesium (Mg)

16.

As you move down the periodic table atoms get bigger. This is because ____________.

The atoms have more mass.

The atoms have more protons.

The atoms have more energy levels

The atoms have more nuetrons

17.

As you move across the periodic table atoms tend to get smaller because, ______________.

the atoms have more mass.

the atoms have less mass

the atoms have more protons.

the atoms have less electrons.

18.

Atoms that have a high electronegativity, _______________.

give up their electrons more easily.

hold on to their electrons more tightly.

have more electron shells.

19.

Ionization energy is...

the energy required to add an electron to a specific atom

how much energy it takes to remove an electron from an atom

the energy required to shield the outer electrons from the nucleus

a measure of the ability of an atom to attract electrons

20.

In which group does this atom belong?

21.

How many energy levels does an atom of Chlorine have?

22.

When we built our periodic table, there were holes. What do these spaces represent?

isotopes.

elements we did not have information about.

ions

There were no holes. We were wrong.

23.

Which atom would be the hardest to ionize?

Lithium

Carbon

Oxygen

Neon

24.

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

Absorb energy

Release energy

25.

Carbon has three known isotopes. Which is the most abundant?

carbon-12.011

carbon-12

carbon-13

carbon-14

26.

Use your periodic table. There are two isotopes of rubidium: ⁸⁵Rb and ⁸⁷Rb. Which is more abundant?

equally abundant

rubidium-85

rubidium-85.47

rubidium-87

27.

How many peaks would the PES of Chlorine have?

What's PES?

100 %

Unit 2 Review

Total questions: 27

Worksheet time: 1hrs 18mins

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