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Intro To Chemistry
Test Description: Review of the properties and structure of atoms, the Periodic Table of Elements, Ions Isotopes and simple formulas
Instructions: Answer all questions to get your test result.
1) Mendeleev created the first periodic table by arranging elements in order of
A
increasing atomic number
B
increasing atomic mass
C
decreasing atomic mass
D
increasing melting points and densities
2) The atomic number of an element is based on the
A
number of protons in its nucleus
B
mass of its nucleus
C
number of electrons around its core
D
number of neutrons in its nucleus
3) From an element's location in the periodic table, you can predict
A
its chemical name
B
when it was discovered
C
its properties
D
its chemical symbol
4) The two most common alkaline earth metals are
A
copper and zinc
B
iron and silver
C
Calcium and magnesium
D
sodium and potassium
5) At room temperature, more than half of the nonmetal elements are
A
liquids
B
gases
C
alloys
D
solids
6) The elements that do not ordinarily form compounds are
A
Noble gases
B
metals
C
elements in the carbon family
D
halogens
7) Which is a property shared by most molecular compounds?
A
high melting point
B
high boiling point
C
low melting point
D
nonpolar bonds
8) When an atom loses an electron, it becomes a
A
neutral atom
B
positive ion
C
neutral ion
D
negative ion
9) Magnesium bromide is an ionic compound with the chemical formula MgBr2. (the 2 should be a subscript) What does the '2' tell you?
A
There are two bromide ions for every magnesium ion
B
Bromide has a -2 charge
C
Bromide has a +2 charge
D
There are two magnesium ions to every bromide ion
10) In the chemical formula for an ionic compound, which item is written first?
A
the subscripts
B
The name of the positive ion
C
the charges
D
the name of the negative ion
11) The chemical name for the compound with the formula Na2S is (the 2 is a subscript)
A
magnesium sulfide
B
sodium sulfide
C
lithium oxide
D
sodium flouride
12) What is a double bond
A
two pairs of electrons shared between two atoms
B
one pair of electrons shared between two atoms
C
two pairs of electrons shared between four atoms
D
a bond between two atoms
13) Electrons involved in bonding between atoms are
A
inside the nucleus
B
positively charged
C
valence electrons
D
closest to the nucleus
14) What are two ways that a proton and a neutron are similar?
A
They are located in the nucleus and have a charge of +1
B
They are located in the nucleus and have an atomic mass of 0
C
They are located in the nucleus and have a charge of zero
D
They are located in the nucleus and have an atomic mass of 1
15) How is it possible for an atom to have no charge even though it is made up of protons, neutrons and electrons?
A
The number of protons and neutrons are equal, so the charge is equal
B
None of these answers
C
The number of electrons and neutrons are equal, so the charge is zero
D
The number of protons and electrons are equal, therefore the charge is equal
16) Why is it UNnecessary to include the electrons when determining the mass of an atom?
A
The mass of the electrons is so large that it can't be added
B
The mass of the electron is so small that it wouldn't change the mass
C
An electron has a negative charge
D
The electrons are not located in the nucleus, so they don't count
*select an answer for all questions
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