Unit 3 Review

Multiple Choice

The early periodic table grouped elements based on similar properties. Which element would be grouped with potassium using this principle?

• A.

  magnesium

• B.

  sodium

• C.

  sulfur

• D.

  zinc

Multiple Choice

At the time of Mendeleev, the number of elements known was

• (a) 63

• (b) 65

• (c) 62

• (d) 64

Multiple Choice

What family is highlighted in the picture?

• Alkali Metals

• Alkaline Earth Metals

• Halogens

• Noble Gases

Multiple Choice

Hydrogen is a gas at room temperature, but it is found with the alkali metals in group 1 (1A) on the periodic table. Which is the most likely reason hydrogen is grouped with alkali metals?

• A. All group 1 (1A) elements have the same number of protons.

• B. Alkali metals behave like hydrogen gas at high temperatures.

• C. Hydrogen behaves more like the alkali metals than other gases.

• D. All group 1 (1A) elements have one electron in their outer energy level.

Multiple Choice

What family is highlighted in the picture?

• Alkali Metals

• Alkaline Earth Metals

• Halogens

• Noble Gases

Multiple Choice

What are the characteristics of transition metals as described in the image?

• They are all gases at room temperature

• They form ions with a charge of usually +1

• They are good conductors of heat and electricity

• They are found only in pure form

Multiple Choice

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

• Alkali
• Alkali Earth
• Halogen
• Noble Gas

Multiple Choice

Based on these drawing, which element is the least reactive?

• Neon, because it has two energy levels with 8 electrons in the second level.

• Chlorine, because it has 3 energy levels with 7 electrons in the third level.

• Gallium, because it has 4 energy levels with 3 electrons in the fourth level

• Tin, because it has 5 energy levels with 4 electrons in the fifth level.

Multiple Choice

Which color on the image of the periodic table corresponds with the alkaline earth metals.

• yellow

• dark yellow

• blue/green

• teal

Multiple Choice

What characteristics are shared by all alkali metals and alkaline earth metals?

• They conduct electricity very well.

• They are strong and shiny.

• They form alkaline solutions when mixed with water.

• They do not react with water at all.

Multiple Choice

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

• decreases, increases 
• increases, increases
• increases, decreases 
• stays the same, increases

Multiple Choice

Which atom has the largest atomic radius?

• potassium

• rubidium

• francium

• cesium

Multiple Choice

Put these in increasing order:
F, N, B

• B < N < F
• B < F < N
• N < F < B
• F < N < B

Multiple Choice

What is the trend of ionization energy as you move down a group and across a period in the periodic table?

• Increases down a group, decreases across a period

• Decreases down a group, increases across a period

• Increases both down a group and across a period

• Decreases both down a group and across a period

Reorder

Put the following in order of increasing ionization energy: Cobalt (Co), Tungsten (W), Ruthenium (Ru)

• Tungsten

• Ruthenium

• Cobalt

1

2

3

• 1
• 2
• 3

Multiple Choice

What is the trend for ionic radius down a group?

• increase

• decrease

• remain constant

Multiple Choice

The element with the smallest ionization energy in Period 6 is - 

• Rn
• Cs
• Os
• Tm

Multiple Choice

Of the halogens, which has the smallest radius?

• F

• Br

• He

• At

Multiple Choice

Which of the following halogens has the greatest electronegativity?

• Chlorine (Cl)

• Bromine (Br)

• Iodine (I)

• Astatine (At)

Multiple Select

Select ALL that explain the ionization energy trend within periods going left to right

• electrons are closer to the nucleus

• their is a weak pull between electrons from the nucleus, making them easily moveable

• feel more of a pull from nucleus, making them harder to move

• electrons are further from the nucleus

Categorize

Options (8)

hydrogen (H)

sodium (Na)

boron (B)

aluminum (Al)

nitrogen (N)

phosphorus (P)

chlorine (Cl)

bromine (Br)

Organize these elements into the right valence electron categories.

1 valence electron

3 valence electrons

5 valence electrons

7 valence electrons

Multiple Choice

What does the Lewis Dot Structure represent?

• The arrangement of protons in an atom

• The valence electrons surrounding the atomic symbol

• The number of neutrons in an atom

• The chemical bonds between atoms

Multiple Choice

What are the two rules for drawing Lewis dot structures as mentioned in the image?

• No side can have more than two dots

• Each side gets one dot before doubling up

• Hydrogen and helium are exceptions

• All elements follow the same rules

Multiple Choice

This is a correct dot diagram for oxygen (O)

• true
• false

Multiple Choice

This is a correct dot diagram for fluorine (F)

• true
• false

Multiple Choice

Which is the electron configuration for an oxygen atom?

• 1s²2s²2p⁶3s²3p⁶4s²
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶

Multiple Choice

What is this element? 
1s²2s²2p⁶3s²3p⁶
4s²3d¹⁰4p⁶

• Argon
• Krypton
• Selenium
• Bromide

Multiple Choice

What atom matches this electron configuration?
[Xe] 6s² 4f¹⁴ 5d⁹

• Mercury
• Gold
• Platinum
• Thallium

Multiple Choice

How many valence electrons does phosphorus have?

• 5
• 2
• 8
• 15

Multiple Choice

Which element is pictured?

• neon
• fluorine
• magnesium
• argon

Multiple Choice

What element in Period 4 has 5 valence electrons?

• Zr
• As
• V
• Sb