How do metal atoms form ions?
They lose electrons to form negative ions
They gain electrons to form positive ions
They lose electrons to form positive ions
Which of these statements about a negative ion is true?
It has an equal number of protons and electrons
It has more protons than electrons
It has more electrons than protons
Bromine is in group 7 of the periodic table. What is the charge on its ions?
-1
-2
1
A magnesium ion has the formula Mg2+. What is its electronic structure?
2.8
2.8.2
2.8.4
What type of forces hold an ionic lattice together?
Electrostatic forces
Covalent forces
Ionostatic forces
A diagram of part of the crystal of calcium chloride shows 15 calcium ions and 30 chloride ions. What is the formula of calcium chloride?
CaCl
CaCl2
Ca2Cl
What properties does an ionic compound have?
A low boiling point and it conducts electricity when dissolved in water
A high melting point and it conducts electricity when liquid
A high boiling point and it conducts electricity when solid
Which of these is an advantage of a two-dimensional space-filling model?
It shows the directions of the forces between the ions
It shows the arrangement of ions in many layers
It shows the arrangement of ions in one layer
Sulfur is in group 6 of the periodic table. What is the formula of its ion?
S6-
S6+
S2-
An ion has the formula Ba2+. What group of the periodic table is its element in?
2
6