Chapter 4/5 Test review Flashcards
Which is a property shared by most molecular compounds?
a) low melting point
b) high boiling point
c) nonpolar bonds
low melting point
In an atom, the number of protons equals the number of
electrons
The elements that DO NOT ordinarily form compounds are
inert gases.
In the periodic table, the most reactive metals are found
in Group 1, the first column on the left
A chemical bond formed when two atoms share electrons is called a(n)
covalent bond.
Magnesium bromide is an ionic compound with the chemical formula MgBr2. What does the “2” tell you?
There are two bromide ions for every magnesium ion.
What is the chemical name for the compound with the formula Na2S?
sodium sulfide
(Ca+2), _____, (Ca3N2), name of compound is____________________
(N -3) Calcium Nitride
When an atom loses an electron, it becomes a
positive ion.
What is the greatest number of valence electrons an atom can have?
8
Electrons involved in bonding between atoms are
Valence electrons.
What information in the periodic table indicates the number of protons in an atom?
the element’s atomic number
Fluorine, chlorine, bromine, and iodine are part of a family called
halogens
A material is said to be ductile if it
can be pulled out, or drawn, into a long wire.
What happens in an ionic bond, SPECIFICALLY with the electrons of each atom? Use Sodium and Chlorine in your answer.
The sodium has an electron to give away and the chlorine needs an electron
Which of the following is a characteristic property of ionic compounds?
They form hard, brittle crystals with characteristic shapes.
