WorksheetsUnit 1 -Properites of Matter TEST
Total questions: 35
Worksheet time: 20mins
How many different TYPES of ATOMS are in this image?
1
2
3
4
Which model (s) show represent an element?
A
B
C
D
E
Select the correct answer
Element
Compound
Using the reaction 2H2 + O2 → 2H2O, what product forms when hydrogen reacts with oxygen?
Hydrogen chloride
Water
Zinc chloride
Ozone
The chemical formula NH3 indicates a molecule composed of one _______ atom and three _______ atoms.
hydrogen; nitrogen
oxygen; hydrogen
nitrogen; hydrogen
carbon; oxygen
Identify the charge of a proton as depicted by the plus signs in Maria’s nucleus.
Negative
Neutral
Positive
Variable
How many atoms in all are in a molecule of serotonin?
C10H12N2O
Mixtures contain two or more different substances. What key feature differentiates mixtures from compounds?
Mixtures are held together by chemical bonds.
Mixtures are not held together with a chemical bond.
Mixtures must be elements only.
Mixtures cannot be separated.
According to the diagram, Javier ordered four elements from most reactive to least reactive as K → Mg → C → He. Is Javier’s arrangement correct? Choose the best explanation.
Yes, because the reactivity of elements decreases as their atomic numbers decrease.
Yes, because the reactivity of elements decreases from left to right on the periodic table.
No, because the reactivity of elements decreases from right to left on the periodic table.
No, because the reactivity of elements decreases as their atomic masses increase.
Which of the following is a physical change?
Burning wood
Rusting iron
Baking a cake
Melting ice
Which of the following best describes a compound?
A substance formed when two or more elements are chemically bonded
A solution of gases
A mixture of two elements not chemically bonded
A substance made of only one type of atom
What is the total number of atoms in a molecule of H2O?
4
1
2
3
Which of the following is NOT a property of elements?
They have a unique set of properties
They are listed on the periodic table
They can be broken down by chemical means
They are made of only one kind of atom
What is a negatively charged subatomic particle found outside of the nucleus of the atom?
Electron
Proton
Neutron
Atom
What is a mixture that is uniform throughout, where the substances are evenly mixed and cannot be visibly distinguished?
Homogeneous Mixture
Heterogeneous Mixture
Solution
Compound
Wendy draws a model to represent a neutral beryllium (Be) atom. Her model has 4 neutrons and 4 protons in the nucleus. It also has 5 electrons in orbits around the nucleus. Wendy's teacher says there is an error in her model. What is the error?
The model has too many protons.
The model has too many electrons.
The shows protons in the wrong location.
The model shows electrons in the wrong location.
What is a positive subatomic particle found in the nucleus of an atom?
Proton
Electron
Neutron
Atom
What are new substances formed as a result of a chemical reaction (located in the direction of the pointing arrow in a chemical equation)?
Products
Reactants
Catalysts
Inhibitors
What can be recognized only when substances react or do not react chemically with one another, that is, when they undergo a change in composition?
Chemical Properties
Physical Properties
Nuclear Properties
Thermal Properties
Terry is learning about chemical reactions in science class. Terry's teacher draws an equation on the chalkboard and explains that the equation demonstrates the law of conservation of mass. What evidence supports this claim?
The same chemicals appear in both the reactants and the products.
The equation shows that the reaction produced a new substance.
There are equal numbers of each element in the reactants and in the products.
The arrangement of the chemicals in the reactants is the same as their arrangment in the products.
Methane is a pure substance and exists as a gas at room temperature. Each methan molecule is made up of one carbon atom chemically bonded to four hydrogen atoms. How is methane classified?
as an element
as a compound
as a homogeneous mixgture
as a heterogeneous mixture
Dean, Shiloh, and Evelyn are on a field trip to a farm. They come across a patch of soil. How would they classify this soil? Choose all that apply.
element
compound
homogeneous mixture
heterogeneous mixture
pure substance
What is the primary difference between a physical change and a chemical change?
A physical change results in a new substance, while a chemical change does not.
A chemical change results in a new substance, while a physical change does not.
Both changes result in new substances.
Neither change results in new substances.
How many atoms are in the molecule HCs3NaO2
12
7
11
14
Which of the following best explains why a chemical reaction is considered balanced?
The number of molecules is the same on both sides of the equation.
The number of atoms of each element is the same on both sides of the equation.
The total volume of reactants and products is equal.
The total energy of the system remains constant.
Label the atom
negative
positive
neutral
The periodic table is organized into vertical groups of
elements with similar properties.
compounds with different properties.
elements with all the same chemical properties.
compounds with all different physical properties.
How many elements are on the periodic table?
56
93
118
154
Which is an example of a chemical change?
Cutting paper
Digesting Food
Crumbling paper
Boiling water
What is the atomic number for silver (Ag)?
What element has the the same properties as lithium (Li)?
Which element is in group 13, period 3 on the Periodic Table of Elements?
How many neutrons are in a neutral atom of krypton (Kr)?
