chem final

Which subatomic particle has the SMALLEST mass?

an electron

Which element is NOT a metal?

b) N

What two particles reside in the nucleus?

c) protons and neutrons

The atoms in which pair have similar properties?

Li and Na

The atomic number tells us _____.

both the number of electrons in a neutral atom and the number of protons in a nucleus

Which symbol represents an atom with 8 protons and 10 electrons?

O2–

An atom becomes an anion with a –1 charge. The atom must have _____.

gained an electron

Fluorine, Chlorine, and Bromine all belong to what family?

halogens

What is the name of the binary acid HBr?

hydrobromic acid

The systematic name for the compound Fe2(SO4)3 is _____.

iron(III) sulfate

The ionic formula for magnesium nitride is

Mg3N2

Members of the halogen family typically form ions with a charge of _____.

–1

When aluminum and sulfur react, what is the formula of the resulting compound?

Al2S3

In this reaction, the symbol (aq) after BaCl2 means that it is _____.

BaCl2 (aq) + Na2CO3 (aq) → BaCO3 (s) + 2 NaCl (aq)

d) dissolved in water

Which choice BEST represents a balanced equation for the reaction of nitrogen gas and chlorine gas to form nitrogen trichloride?

N2 + 3 Cl2 → 2 NCl3

In this reaction, BaCO3 is the _____.

precipitate