Grade 8 Elements and Chemical Bonds Summer School

Grade 8 Elements and Chemical Bonds Summer School

Multiple Choice

Which group on the periodic table is the most reactive?

• Group 1

• Group 2

• Group 13

• Group 18

Multiple Choice

How are elements organized in the periodic table ?

• Alphabetically

• Based on physical and chemical properties

• Increasing number of electrons

• Most reactive to least reactive

Multiple Choice

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

• atomic number.

• name.

• chemical symbol.

• atomic mass.

Multiple Choice

Elements in an elemental family have similar

• atomic symbols.

• atomic sizes.

• atomic weights.

• chemical properties.

Multiple Choice

Most elements are

• metals.

• nonmetals.

• metalloids.

• semiconductors.

Multiple Choice

Each column of the periodic table is

• an element.

• a group.

• an isotope.

• a period.

Multiple Choice

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

• protons.

• neutrons.

• valence electrons.

• protons and neutrons.

Multiple Choice

The order of elements in the periodic table is based on

• the number of protons in the nucleus.

• the electric charge of the nucleus.

• the number of neutrons in the nucleus.

• atomic mass.

Multiple Choice

How many valence electrons are found in atoms of group 1?

• 7
• 6
• 4
• 1

Multiple Choice

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

Multiple Choice

This is a correct dot diagram for nitrogen (N)

• true

• false

Multiple Choice

This could be the dot diagram of

• Mg

• Cl

• C

• O

Multiple Choice

How do covalent bonds form?

• Donating & receiving valence e- between atoms.
• Opposite slight charges attract each other between compounds.
• Scientists are still not sure how they form.
• Sharing valence e- between atoms.

Multiple Choice

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

Multiple Choice

In a covalent bond, one or more electrons are? 

• shared 
• lost 
• gained 
• transferred 

Multiple Choice

What molecule is this?

• CO
• CO2
• C2O
• C2O2

Multiple Choice

Most atoms have no net charge because they have....

• an equal number of charged and non-charged particles
• neutrons in their nuclei
• an equal number of electrons and protons
• an equal number of neutrons and protons

Multiple Choice

Electrons have a charge of:

• -1
• -2
• +1
• +2

Multiple Choice

Protons have a charge of:

• -1
• +1
• -2
• +2

Multiple Choice

Which of the following describes covalent bonds?

• Bonds form because of opposite charges
• Bonds form to fill outer electron shells
• Electrons are transferred between atoms
• Covalent bonds are magical

Multiple Choice

How are ionic bonds formed?

• Transfer of electrons
• Sharing of electrons

Multiple Choice

Ionic bonds are between...

• Metal and Non-metal
• Non-metal and Non-metal
• Metal and Metal

Multiple Choice

The negative ions tend to _____________ electrons.

• lose

• gain

Multiple Choice

The positive ions tend to _____________ electrons.

• lose

• gain

Multiple Choice

What is meant by the term "sea of electrons"?

• It's what we call all the free floating electrons in a metal.

• It's what we call electrons that are floating in a liquid.

• It's the total number of electrons in a metal atom.

• It's the total number of electrons in the ocean.

Multiple Choice

What do electrons do in a metallic bond?

• They stay on the metal atom.

• They are transferred from atom to atom.

• They form a covalent bond with another atom.

• They float around freely.

Multiple Choice

A metallic bond is a bond between ________.

• nonmetals

• metals

• transition metals

• metalloids

Multiple Choice

At room temperature, most metals are

• liquid
• solid
• gas
• an alloy