ATOM-MOLELE-CHEMICAL BONDING

Multiple Choice

Which of the following best describes a compound?

• A substance that cannot be broken down by chemical reactions

• A substance consisting of two or more different elements combined in a fixed ratio

• Anything that takes up space and has mass

• A single atom of an element

Multiple Choice

What is the atomic number?

• the number of protons

• the number of protons and neutrons

• the number of neutrons

• the number of atoms

Multiple Choice

What is the mass number defined as?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Multiple Choice

What is the atomic number of this atom?

• 1
• 3
• 4
• 7

Multiple Choice

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Multiple Choice

The fluorine atom has an atomic number of

• 19

• 9

Multiple Choice

What is the mass number and atomic number ?

• Mass number = 7, atomic number = 14

• Mass number = 14, atomic number = 7

Multiple Choice

Which particle has a positive charge?

• electron
• orbital
• proton
• neutron

Multiple Choice

Choose the particle that has no charge.

• nucleus
• neutron
• proton
• electron

Multiple Choice

Which subatomic particle has a negative charge in the atom?

• proton

• neutron

• electron

• quark

Multiple Choice

What is the formula to solve for the neutron?

• Mass + Atomic Number= Neutrons
• Mass x Atomic Number = Neutrons
• Mass - Atomic Number = Neutrons
• Mass + Number of Protons = Neutron

Multiple Choice

Which subatomic particle is found in the nucleus of an atom and carries a positive charge?

• Proton

• Electron

• Neutron

• Photon

Multiple Select

Which of the following statements about atoms are correct?

• The nucleus contains protons and neutrons.

• Electrons orbit around the nucleus.

• Protons are negatively charged.

• Neutrons are uncharged.

Multiple Choice

How many protons are in the isotope pictured above?

• 29

• 34

• 63

• 92

Multiple Choice

Isotopes of an element contain an equal number of protons but a different number of ____________________.

• neutrons

• electrons

• atomic numbers

Multiple Choice

What is the number of protons in Carbon?

• 6

• 18

• 12

• 24

Multiple Choice

The atomic number of an element is the total number of which subatomic particle found in the nucleus?

• Electron

• Neutron

• Proton

• Neutrons + Protons

Fill in the Blanks

Atoms of the same element with different numbers of neutrons are called

.

Multiple Choice

Which four elements make up about 96% of the mass of all living things?

• Oxygen, Carbon, Hydrogen, Nitrogen

• Oxygen, Calcium, Potassium, Sulfur

• Carbon, Hydrogen, Sodium, Magnesium

• Nitrogen, Phosphorus, Chlorine, Iron

Multiple Choice

What is the abbreviation for the 6 elements that make up almost all of the weight of an organism?

• SNOPES

• CHNOPS

• KHDMDCM

• ZNMGFE

Multiple Choice

What element makes up about 65% of our body mass?

• Nitrogen

• Hydrogen

• Zinc

• Oxygen

Multiple Choice

Name the element that makes up most of the mass/ body weight of a living thing.

• Carbon

• Hydrogen

• Nitrogen

• Oxygen

Multiple Choice

Carbon is readily found in all organic compounds.

• True

• False

Multiple Choice

Which 4 elements make up most of all living matter?

• Carbon, Hydrogen, Nitrogen, Oxygen
• Carbon, Oxygen, Sodium, Potassium
• Carbon, Hydrogen, Calcium, Nitrogen
• Carbon, Oxygen, Nitrogen, Sulfur

Multiple Choice

What do we call elements needed in very small amount?

• Molecules

• Atoms

• Trace Elements

• Mega Elements

Multiple Select

Which of the following are considered trace elements required by organisms in very small quantities?

• Iron

• Iodine

• Copper

• Calcium

• Carbon

Open Ended

Explain why trace elements are important for living organisms, even though they are required in very small amounts.

Multiple Select

Which of the following elements are present in the human body in amounts greater than 1% of body mass?

• Oxygen

• Carbon

• Hydrogen

• Calcium

Multiple Choice

Which element makes up the largest percentage of the human body by mass?

• Oxygen

• Carbon

• Hydrogen

• Nitrogen

Multiple Choice

Contains only one kind of atom.

• Element

• Compound

• Mixture

Multiple Choice

Contains more than one type of atom held together by a chemical bond.

• Element

• Compound

• Mixture

Multiple Choice

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element

• Compound

• Mixture

Multiple Choice

What is H₂SO₄ 
 made up of?

• 2 hydrogen, 1 sulfur, 4 oxygen
• 1 hydrogen, 2 sulfur, 4 oxygen
• 2 hydrogen & 4 sodium
• 1 hydrogen & 6 sodium

Open Ended

Explain how the properties of a compound can differ from the properties of the elements that form it, using water as an example.

Multiple Choice

What type of bond is formed when sodium and chlorine combine to make sodium chloride (NaCl)?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

Open Ended

Describe the octet rule and explain its significance in the formation of chemical bonds.

Multiple Choice

What happens to an electron when it absorbs energy in an atom?

• It moves to a higher energy shell

• It moves to a lower energy shell

• It leaves the atom completely

• It becomes a proton

Multiple Choice

Which of the following elements has a full valence shell and is chemically inert?

• Neon

• Oxygen

• Sodium

• Carbon

Open Ended

Compare the electron distribution diagrams of hydrogen and helium. How does this relate to their chemical reactivity?

Fill in the Blanks

The atomic number of helium is

Multiple Choice

Which of the following elements have two electron shells?

• Lithium, Beryllium, Boron, Carbon

• Hydrogen, Helium, Neon, Argon

• Sodium, Magnesium, Aluminum, Silicon

• Oxygen, Fluorine, Neon, Sodium

Multiple Choice

Which element in the second shell has a full outer shell of electrons?

• Nitrogen

• Oxygen

• Fluorine

• Neon

Multiple Select

Which of the following statements about electronegativity are correct?

• Electronegativity increases across a period from left to right.

• Electronegativity decreases down a group.

• Electronegativity is the measure of an atom's ability to attract electrons.

Fill in the Blanks

A covalent bond is formed when two atoms

electrons.

Multiple Choice

In the hydrogen molecule (H₂), how many pairs of electrons are shared between the two hydrogen atoms?

• 0

• 1

• 2

• 3

Multiple Choice

Which type of covalent bond is present in an oxygen (O₂) molecule?

• Single bond

• Double bond

• Triple bond

• No bond

Multiple Choice

Atoms are most stable when their outer shell is complete.

• true
• false

Multiple Choice

How are covalent bonds formed?

• Sharing of electrons
• Transfer of electrons

Multiple Choice

How are ionic bonds formed?

• Transfer of electrons
• Sharing of electrons

Multiple Choice

Why do elements bond?

• To be friends
• To create a new element
• To become stable

Multiple Choice

Is this ionic bond drawn correctly?

• Yes
• No

Multiple Choice

What is a valence electron?

• The sum of neutrons and protons.
• The # of electrons in the last shell.
• A type of bond.
• A popular compound.

Multiple Choice

Gain or lose electrons

• Ionic Bonds
• Covalent Bonds
• Both bonds
• Neither bond

Multiple Choice

This picture shows a...

• Ionic Bond
• Covalent Bond
• Both bonds
• Neither bond

Multiple Choice

This picture shows a...

• Ionic Bond
• Covalent Bond
• Both bonds
• Neither bond

Multiple Choice

Water molecules are held together by what type of bond?

• Hydrogen

• covalent

• ionic

• none

Multiple Choice

Atoms in a water molecule are held together by what type of bond?

• Ionic

• hydrogen

• covalent

• none

Multiple Choice

In nonpolar covalent bonds, how are the bonding electrons shared by the bonded atoms?

• Equally

• Unequally

• Transferred

• Not shared

Multiple Choice

In polar covalent bonds, how are the bonding electrons shared by the bonded atoms?

• Equally

• Unequally

• Transferred

• Not shared

Multiple Choice

Covalent bonds are between...

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

Multiple Choice

Ionic bonds are between...

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

Multiple Choice

How are covalent bonds formed?

• Sharing of electrons
• Transfer of electrons

Multiple Choice

In the process of ionic bonding, ions come together because

• opposite charges repel
• positive and negative ions attract
• salt is magnetic
• like charges attract each other

Multiple Choice

How many covalent bonds are created in a single ammonia molecule?

• 0

• 1

• 2

• 3

• 4

Multiple Choice

How many covalent bonds are created in a single water molecule?

• 0

• 1

• 2

• 3

• 4

Multiple Choice

Covalent Bonds

• metal with nonmetal

• nonmetal with nonmetal

Multiple Choice

Ionic Bonds

• metal with nonmetal

• nonmetal with nonmetal