Chlorine occurs naturally as two isotopes. Chlorine contains 75% chlorine–35 and 25% chlorine–37. Calculate the Relative Atomic Mass of chlorine
35
36.2
35.5
36
Which of these is true regarding covalent bonding:
Takes place between non-metals
Involves sharing of electrons
An example of a covalent compound is methane
All of these answers
This diagram shows:
Metallic bonding
Ionic bonding
Covalent bonding
Isotropic bonding
In order to form calcium chloride:
The calcium atom loses two electrons
Two chlorine atoms each receive one electron
One Ca2+ and two Cl- ions are formed
The magnesium ion is:
Mg2+
Mg+
Mg2-
Mg-
In sodium chloride the following ions are formed:
Na- Cl-
Na- Cl+
Na+ Cl-
Na+ Cl+
Which of these facts about solid sodium chloride is false:
It has a high melting point
It has a high boiling point
It conducts electricity
The ions are held together by electrostatic forces
Ionic bonding involves:
Sharing of electrons between atoms
Atoms gaining or losing electrons and becoming neutral overall
Atoms gaining or losing electrons and becoming charged overall
The loss or gain of protons
The formula for magnesium oxide is:
Mg2O
MgO2
MgO
Mg2O3
Isotopes have:
The same number of protons
The same number of neutrons
The same mass number
Different numbers of electrons
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