Font size
WorksheetsOctober Benchmark Review
Total questions: 35
Worksheet time: 3hrs 55mins
Which part of the atom shown is a neutron?
1
2
3
What is a substance made of atoms of two or more different elements joined by chemical bonds called?
Compounds
Mixtures
Solute
Matter
Identify the substance shown.
Mixture
Element
Compound
Atom
How many total atoms are in the chemical formula CaOCl2?
2
4
5
6
The attached diagram shows the formation of water. Which of the following occurs when water forms?
Two hydrogen atoms are destroyed to form atoms of water
One oxygen atom gives an electron to each of two hydrogen atoms
Two hydrogen atoms each give an electron to an oxygen atom
One oxygen atom shares electrons with two hydrogen atoms
Identify the substance shown.
Element
Compound
Mixture
Atom
An element is a substance made of _________ types of atoms.
The same
Different
Opposite
A compound is a substance made of __________ atoms that are chemically combined.
The same
Different
No
How many electrons does gold have? Use the attached periodic table.
47
197
79
108
Which letter identifies a subscript in the chemical equation shown?
Letter A
Letter B
Letter C
Letter D
Which of the following is a simple molecule (element), but not a compound?
A
O3
H2O
CO2
N2
Cl2
A substance freezes, changing from a liquid to a solid. For a substance to transition from a liquid to a solid, what must be removed from it?
Heat
Cold air
Gases
Particles
An atom of carbon will ________ with an atom of oxygen to form the molecule carbon monoxide.
Bond
Molecule
Matter
Explode
A __________ of carbon dioxide contains one carbon atom and two oxygen atoms.
Bond
Molecule
Matter
Atom
Which model represents molecules that are made of only a single element?
Oxygen gas (O2)
Carbon disulfide (CS2)
Neon gas (Ne)
Liquid Water (H2O)
A dog, a tree, orange juice, water, and oxygen are all examples of _________ .
Bond
Molecule
Matter
Energy
Which part of the atom shown is an electron?
1
2
3
Use the attached picture. The black circles are Carbon. The blue circles are hydrogen. How many different elements make up a single molecule of methane?
1
2
3
It is impossible to tell
Use the attached picture. What would be the correct chemical formula for all the models of methane pictured?
8CH4
4C2H8
C8H16
CH4
How many atoms are in a single molecule of CH4?
A
2
4
5
1
The model shown represents water. Based on the labels, what is the best description of this model?
X represents a molecule; Y represents a particle; Z represents an atom of water
X represents an atom; Y represents a molecule; Z represents a particle of water
X and Y represent atoms; Z represents a molecule of water
X and Y represent molecules; Z represents an atom of water
When atoms are joined together, they form ____________.
Electrons
Nuclei
Protons
Molecules
Select each correct answer. More than one answer may be correct.
A molecule can be made of which of the following?
A single atom
Many elements
A single element
Which of the following represents a molecule?
He
O2
C
Na
The diagram attached shows atoms that are all arranged into groups in the same way. What does this diagram represent?
A single type of substance
A single type of element
Three different substances
Two different substances
Which of the following statements best describes a molecule?
Molecules must have at least three atoms
Molecules can have any number of atoms, from one to thousands
Molecules must be made of only one atom
Molecules can have two to thousands of atoms
Which of the following diagrams shows a pure substance that is composed of only individual atoms and not molecules?
Hydrogen gas (H2)
Carbon dioxide gas (CO2)
Argon gas (Ar)
Liquid water (H2O)
Measuring the average energy of motion of the particles in a substance is the same as measuring the substance's __________.
Mass
Temperature
Pressure
Heat Capacity
How many protons does Iron have? Use the attached periodic table.
77
193
56
26
Hector's father places a metal pot on the stove and turns the stove on. Hector knows that the metal pot heats up. What happens to the metal particles as the pot heats up?
They vibrate faster and move farther apart
They vibrate faster and move closer together
They vibrate slower and move farther apart
They vibrate slower and move closer together
A student creates a ball-and-stick model to represent the atomic scale of a substance. Which of these best describes the model shown?
1 element with 10 molecules
1 molecule with 10 atoms
10 molecules representing 10 elements
10 elements representing 10 molecules
Particles are spaced the farthest apart in ____________ and the closest together in ____________ . Select the answer that best completes the sentence.
Liquids; Solids
Gases; Liquids
Solids; Gases
Gases; Solids
Two types of large molecules are __________ and ___________.
A
Polymers and crystals
Polymers and compounds
Crystals and atoms
Compounds and crystals
Using the diagram answer the following question. What change of state is depicted by Arrow #4?
Freezing
Boiling/ Evaporation
Condensation
Sublimation
Melting
Which of the following models represent compounds? Select all that apply.
Oxygen gas (O2)
Carbon disulfide (CS2)
Neon gas (Ne)
Liquid Water (H2O)
