ISOTOPES
How many neutrons does the isotope 234-Th have
144 neutrons
Give the formula of the ionic compound Aluminum and fluoride
AlF3
Name the following covalent compound SO3
sulfur trioxide
What is the chemical name of NH4+
Ammonium
Give the names of the following acid: HCl
Hydrochloric acid
An element produces an ion with a +3 charge. If an isotope of this element has a mass number of 158 and 61 electrons, what is the identity of the element?
Gd, Gadolinium
Name the following ionic compound Ca3P2
calcium phosphide
Name the following covalent compound IF6
iodine hexafluoride
What is the chemical name of CrO42-?
Chromate
Give the formulas the following acids: Nitric Acid
HNO3
Boron exists in two isotopes, boron-10 and boron-11. Based on the atomic mass, which isotope should be more abundant?
The atomic mass of boron is 10.811; therefore, boron-11 is more abundant because the mass number is closer to the atomic mass.
Name the following ionic compounds Pb(CN)4
lead (IV) cyanide
Name the following covalent compound Br2S6
dibromine hexasulfide
What is the chemical name of CO32-
Carbonate
Give the names of the following acids: H2CrO4
chromic acid
What is an isotope?
An isotope is a type of atom that has the same number of protons as another atom of the same element, but a different number of neutrons
Give the formula of the following ionic compound, iron(III) hydrogen sulfate
Fe(HSO4)3
What is the correct molecular formula for the compound, xenon difluoride?
XeF2
Is NO3- nitrite or nitrate
nitrate
Give the name for the following acid: H2Se
hydroselenic acid
Rubidium is a soft, silvery-white metal that has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 80.2% and the abundance of 87Rb is 19.8%, what is the average atomic mass of rubidium?
85.40 amu
Give the formula of the following ionic compounds ammonium bromate
NH4BrO3
What is the formula for Heptane
C7H16
What elements are contained in the ion phosphate? specify how many of each element and their overall charge (
1 phosphorus, 4 oxygen, and a 3- charge
Give the names of the following acid, H3P
hydrophosphoric acid