WorksheetsChemistry mid term part 1
Total questions: 41
Worksheet time: 23mins
Name
Class
Date
1.
Which of the following is true about compounds?
a)
They can be physically separated into the component elements
b)
Their elements are never in fixed ratios or proportions
c)
They are substances.
d)
They have properties similar to those of their elements
2.
Which step in the scientific process requires you to use your senses?
a)
Making a hypothesis.
b)
Designing an experiment.
c)
Making an observation.
d)
Stating a theory.
3.
The smallest particle of an element that retains the properties of that element is...
a)
A proton
b)
A Neutron
c)
An Electron
d)
An Atom
4.
Which of the following are NOT physical properties of matter?
a)
Size and Color
b)
Mass and Volume
c)
Texture and Hardness
d)
Ability to rust.
5.
The inner electrons help _________outer valence electrons from the nucleus.
a)
attract
b)
spin
c)
shield
d)
excite
6.
An element has an atomic number of 76. Number of protons and electrons in the neutral element are
a)
152 protons and 76 electrons
b)
76 protons and 0 electrons
c)
38 protons and 38 electrons
d)
76 protons and 76 electrons
7.
Which state of matter takes the shape of its container?
a)
solid
b)
liquid
c)
gas
d)
plasma
8.
Isotopes of the same element have different ____.
a)
numbers of electrons
b)
atomic numbers
c)
numbers of neutrons
d)
numbers of protons
9.
Which of the following is a physical change?
a)
corrosion
b)
explosion
c)
rotting of food
d)
evaporation
10.
How many valence electrons are in an atom of phosphorus?
a)
3
b)
4
c)
5
d)
6
11.
What is the electron configuration of potassium?
a)
1s22s22p 63s23p 64s1
b)
1s22s23s23p 63d 1
c)
1s22s22p 103s23p 3
d)
1s22s22p 23s23p 24s1
12.
According to Hund's Rule electrons fill orbitals of a shape at an energy level...
a)
In pairs of electrons
b)
From highest energy levels to lowest
c)
Orbitals must fill one electron at a time before adding asecond
d)
In no particular order.
13.
Which of the following is a transition metal?
a)
Cesium (Ce)
b)
Tellurium (Te)
c)
Copper (Cu)
d)
Tin (Sn)
14.
The positively charged particle in an atom is the
a)
neutron
b)
proton
c)
HPO2
d)
electron
15.
Which of these elements would have the smallest ionization energy?
a)
N
b)
Ne
c)
Na
d)
Mg
16.
What is the molar mass of CO2
a)
44 g
b)
20g
c)
28 g
d)
16 g
17.
Which subatomic particle is located outside the nucleus?
a)
electron
b)
proton
c)
neutron
d)
A positively charged particle
18.
The word atom comes from the Greek word atomos which means:
a)
Uncuttable
b)
Tiny
c)
Matter
d)
Orbital
19.
The expression 5008 in scientific notation is
a)
5008 x 100
b)
5.008 x 103
c)
50.08 x 104
d)
5.008 x 104
20.
Which of the following statements is TRUE?
a)
Atoms are the smallest living organism.
b)
The number of protons determines what an element is.
c)
Electrons are larger than protons.
d)
Most of the atom is filled with electrons.
21.
What is the measurement 111.009 mm rounded off to four significant digits?
a)
111
b)
111.0
c)
111.01
d)
110
22.
How many atoms of silver are in 215.74g of silver
a)
3.819x1023
b)
0.2132
c)
2
d)
1
23.
The center of the atom is called the...
a)
Orbital
b)
Nucleus
c)
Core
d)
Matter
24.
What is the volume of 44g of propane if the density is 493g/L?
a)
0.09
b)
0.0335
c)
22.4
d)
16.8
25.
Dalton stated that atoms of different elements combine in simple ___________ to form compounds.
a)
Conservation
b)
Reactions
c)
Whole number ratios
d)
Subdivided particles
26.
Most of an atom is...
a)
Filled with air
b)
Empty space
c)
Filled with electrons
d)
Covalent bonds
27.
Information on chemical compatibility can be found from all of the following...EXCEPT:
a)
The Safety Data Sheet for the material
b)
the law of conservation of mass
c)
the philosophy of Aristotle and Democritus
d)
a cathode ray tube
28.
Which orbital is this?
a)
S
b)
P
c)
D
d)
F
29.
There is one s orbital and _____p orbitals for each quantum energy level or period.
a)
5
b)
7
c)
3
d)
1
30.
Which of the following statements is false
a)
Atoms can share electrons
b)
All atoms are the same
c)
In a neutral atom their are equal numbers of protons and electrons
d)
Isotopes have different numbers of neutrons but the same number of protons
31.
What is the fastest moving particle of an atom is...
a)
The proton
b)
The electron
c)
The neutron
d)
The quark
32.
The charge of a neutron is ...
a)
Positive
b)
Negative
c)
Neutral
d)
Squirrel
33.
What sub-atomic particle has the smallest mass?
a)
proton
b)
neutron
c)
electron
d)
found in the nucleus
34.
Atomic radius (or diameter of an atom) gets smaller as you go ....
a)
Sideways and down on
b)
Down and left on
c)
Up and right on
d)
Up and left on
35.
The noble gasses are located on the ____________ of the periodic table.
a)
extreme left
b)
the first energy level
c)
d-block
d)
extreme right
36.
How many milligrams in a gram?
a)
10
b)
1000
c)
100
d)
10,000
37.
It is part of the student's responsibility to be appropriately dressed for the lab.
a)
True
b)
False
38.
In the Pauli Exclusion Principle electrons must have opposite __________ to share an orbital.
a)
charges
b)
spins
c)
uncertainty
d)
quantum levels
39.
Gold is atomic number 79 and has an atomic weight of 196.97 (197 amu). How many neutrons does each atom have?
a)
65
b)
120
c)
79
d)
118
40.
the term alkali in alkali and alkaline earth metals refers to their ability to form strong....
a)
electrical charges
b)
acids
c)
bases
d)
relationships
41.
In general, nonmetals are ________ of the periodic table.
a)
at the bottom
b)
to the left
c)
up and to the right
d)
on the back
100 %
