Semester 1 Final Exam Review- Chemistry Question Preview (ID: 43715)


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Which best describes NaCl
a) Ionic
b) Covalent
c) Niether
d) Diatomic Element

If Mg had a charge of 2+, how many protons are there?
a) 12
b) 10
c) 2
d) 22

Which element is more electronegative?
a) Oxygen
b) Aluminum
c) Sodium
d) Francium

How many valence electrons does Boron have?
a) 3
b) 4
c) 1
d) +3

The electron configuration for an atom is 1s2 2s2 2p6 . What is the element?
a) Neon
b) Chlorine
c) Fluorine
d) Oxygen

How many neutrons are there Ni-62?
a) 34
b) 28
c) 62
d) 2

Which of the following is NOT a property of covalent bonding?
a) High Melting Point
b) Low melting point
c) Does not conduct electricity as a solid
d) Partially soluable

For Ti-48, What is the mass number?
a) 48
b) 22
c) 55
d) 24

How many neutrons does Ti-48 have?
a) 26
b) 24
c) 22
d) 48

You start with 800 grams of a radioisotope.  In 21 hours there are 100 grams left.  How long is  the half-life?
a) 7
b) 12
c) 24
d) 1

Silicon belongs to which family?
a) Metalloids
b) Metals
c) Nonmetals
d) none

What is the equation to find out the charge of an ion?
a) p-e
b) e-p
c) n+p
d) n-p

What is the equation to calculate mass number?
a) n+P
b) p-n
c) p-e
d) n-e

Atoms of different isotopes of the same element differ in their total number of
a) Neutrons
b) Electrons
c) Protons
d) Nucleus

What is the total number of electrons in an atom of Cu-65?
a) 29
b) 36
c) 34
d) 30

Calculate the average atomic mass of lithium to the nearest thousandth, which occurs as two isotopes that have the following atomic masses and abundances in nature: 7.30% at 6.017 amu, and 92.70% at 7.018 amu.
a) 6.945amu
b) 7.945amu
c) 6.000amu
d) 9.788amu

The average atomic mass for Barium is 137.327 amu. Which two isotopes do you think is in greater abundance?
a) Barium- 137
b) Barium-138
c)
d)

What family is Bromine a part of?
a) Halogen
b) Alkali Metals
c) Alkaline Earth Metals
d) Rare Earth Metals

Who discovered the electron?
a) JJ Thomson
b) John Dalton
c) Robert Millikan
d) Rutherford

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