Exam 1 Chem Questions Flashcards
(22 cards)
The type of compound that is most likely to contain a covalent bond is ________.
one that is composed of only nonmetals
The correct name for NaHCO3 is ________.
sodium bicarbonate
The correct name for Ni(CN)2 is ________.
nickel (II) cyanide
The tetrafluoroborate ion has a chemical formula of BF4-. What is the formal charge of the boron atom in this ion?
-1
Which of the following is the formula for lead (IV) sulfide?
PbS2
Determine the name for N2O5.
dinitrogen pentoxide
Give the formula for lithium dichromate.
Li2Cr2O7
Place the following elements in order of decreasing atomic size.
Rb > Sr > In > Xe
What is the charge on the Fe ions in Fe2O3?
3+
What is the empirical formula for C16H32O8?
C2H4O
Which of the following represents a physical property?
Mercury is a silvery liquid at room temperature
A physical change:
occurs when water is cooled to ice
Identify the pure substance from the following:
carbon dioxide
How many total electrons can be housed in the 3d-orbitals?
10
How many valence electrons does calcium have?
2
How many core electrons does calcium have?
18
All atoms of a given element have the same ________.
number of protons
Which of the following is the proper electron configuration for calcium?
1s22s22p63s23p64s2
How many electrons does the Ca2+ ion possess?
18
Which of the following is the proper electron configuration for the Ca2+ ion?
1s22s22p63s23p6
Which of the following sets have species containing the same number of electrons?
Cl-, Ar, Ca2+
Identify the compound with covalent bonds
CH4
