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WorksheetsPMA 2 Chem Honors
Total questions: 63
Worksheet time: 2hrs 42mins
The positive ions tend to _____________ electrons.
lose
gain
1s2 2s2 2p6 3s2
Which of the following compounds is sharing their valence electrons unequally?
Br2
HF
O2
F2
A _______ covalent compound forms when electrons are shared unequally.
polar
nonpolar
ionic
metallic
Which of the following is the correct name for the compound K2O?
potassium dioxide
potassium oxide
dipotassium monoxide
potassium hydroxide
Which of the following compounds contains a polyatomic ion?
KBr
CaCl
Mg3(PO4)2
Na2O
What are diatomic elements?
Elements that form two-atom molecules when not combined in a compound.
Two elements that combine with one atom from each element.
Elements that are always in pairs no matter what.
What are the seven diatomic elements?
H2, Cl2, Br2, O2, N2, I2, F2
H2, Cl2, I2, F2, Hg2, Br2, Fe2
H2, Cu2, Ni2, B2, O2, I2, Fe2
Is K2 a diatomic element?
Yes
No
Elements in the same group or column have the same ...
# of valence electrons
# of shells
# of protons
Mass Number
Elements in the same group have __________
Similar Properties
Same number of shells
Similar Mass
Which has the highest ionization energy?
Ca
As
Br
Which would be the easiest to take an electron from?
He
F
Ba
Fr
If an electron moves from n=4 to n=2 it ____
absorbs energy
releases energy
Look carefully at the picture. It shows an electron in the excited state on the left, and the electron returning to its ground state on the right. When the electron return to the ground state it emits a_______________________.
blast of cold air
electrostatic charge
proton
photon (light)
What property determines if an atom is identified as Chlorine?
it has 18 neutrons
it has an atomic mass of 35
it has 17 protons
Its element symbol is Cl
How many neutrons are in an average Chlorine atom?
17
35
35.45
18
The nucleus of an atom contains which subatomic particles?
protons and electrons
protons and neutrons
electrons and neutrons
protons, electrons, and neutrons
What property determines if an atom is identified as Chlorine?
it has 18 neutrons
it has an atomic mass of 35
it has 17 protons
Its element symbol is Cl
K1+ S2-
Al3+ O2-
The name of FeCl₂ is
iron chloride
iron (II) chloride
iron (I) chloride
iron dichloride
Which of the following combinations would need roman numerals in the name?
potassium + fluorine
beryllium + oxygen
boron + iodine
lead + oxygen
