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WorksheetsQ1 Summative Study Guide
Total questions: 33
Worksheet time: 17mins
The atomic mass is the
number of protons and neutrons inside the nucleus
number or electrons or protons
number of protons, neutrons and electrons
All matter is made of _________.
What is the diagram above represents what?
Compound
Molecule
Atom
Electrons
What is the atomic mass of Mg?
12
24
24.305
12.305
How many total protons does a Magnesium atom have?
24.305
12
How many neutrons does Neon have?
20
10
20.180
11
A _____ is a substance made by combining two or more different materials in such a way that no chemical reaction occurs.
Element
Compount
Molecule
Mixture
which of the following is a diatomic element?
HF
CO
CO2
H2
.
The law of conservation of mass states that
matter can not be created or destroyed
matter can be destroyed
matter can be created
matter not change
Students were looking at chemical reactions to investigate the law of conservation of mass. Of the following equations, which one does not follow the law of conservation of mass?
2HCl + Ca(OH)2
--> CaCl2 + 2H2O
Ca + O2 --> CaO
Q.
How could a student prove the law of conservation of mass during a chemical reaction?
boil the chemical reaction
light the chemicals on fire
measure the mass only before the reaction
measure the mass before and after the reaction
the law of conservation of mass
the theory of thermal equilibrium
the law of conservation of momentum
the theory of covalent bonding
Emily mixed water and a bath bomb in a water bottle, with the cap screwed on loosely. She noticed lots of bubbling when she bath bomb touched the water. She took the mass before the experiment and noticed that the mass is lower after she put the bath bomb inside. Why did this happen?
This is impossible, LOCOM says matter can't be destroyed
The system was not totally closed, so matter was able to escape the bottle
The system was not totally open, so matter was able to escape the bottle.
True or False: Compounds are pure substances
True
False
Are mixtures chemically bonded?
No, mixtures are only combined physically.
Yes, mixtures are chemically bonded together
Which word can be used to describe something that:
1. Is composed of two types of atoms
2. Doesn't have a fixed melting point
A Compound
A Pure Substance
An Element
A Mixture
How do we find the number of valence electrons that an atom has?
Look at the atomic number.
It is the same as the number of protons.
Subtract the atomic number from the atomic mass.
Look at the group number for that element.
Conductivity (the ability to transfer heat and electricity) is most closely associated with which group of elements?
Non Metals
Metals
Metalloids
The vertical columns on the periodic table are known as...
Groups
Periods
Cohorts
Columns
The horizontal rows on the periodic table are known as...
Groups
Periods
Cohorts
Columns
The period that an atom is on tell us the number of...
Protons
Electron Shells
Valence Electrons
Neutrons
Using the table above, what can you infer about this element?
It is most likely a liquid metal.
It is most likely a solid metal.
It is a metalloid.
It is a non-metal.
Why are valence electrons important?
They balance out the charges from the protons.
They are used in bonding.
They keep the atom stable.
They are not important to the atom.
The model is showing a
solid
liquid
gas
This model is most likely showing a
solid
liquid
gas
This model is most likely showing a
solid
liquid
gas
at 289.2 K and a pressure of 6701.7, what is the state of matter?
solid
liguid
gas
What happens to the particles in a gas when the gas is cooled?
The particles will slow and compress/sink
The particles will move faster and spread out
T/F: The more particles a gas has, the easier it is to compress
true
false
