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Worksheetschemical bonding
Total questions: 61
Worksheet time: 50mins
What two types of atoms make a covalent bond?
metal atom and metal atom
metal atom and non metal non atom
non metal atom and non metal atom
When an atom loses an electron, it becomes a _________.
noble gas
anion
cation
What part of an atom is involved in chemical bonding?
proton
neutron
electron
How many valence electrons does hydrogen have?
1
2
3
4
Low melting point and low solubility in water are general properties of ______________________ compounds
ionic
covalent
all
Where are the non-metals located on the periodic table?
all over
On the left side of the "staircase"
On the right side of the "staircase"
Predict the bond that is formed between Phosophorus and Chlorine?
Ionic
Covalent
Metallic
H-bond
Which of the pair of elements form an ionic bond?
Magnesium and Oxygen
Magnesium and Sodium
Iron and Zinc
Nitrogen and Hydrogen
How many valence electrons are shown in the diagram?
16
7
6
2
Examine the image: How many bonds are formed looking at the model of the compound? And also indetify what type of bond is formed.
2 bonds; covalent
4 bonds; metallic
2 bonds; ionic
4 bonds; covalent
Which of the following is true for ionic bonding & ionic compounds?
They must be made of ions with like charges.
The negative ion must be written first.
Compounds must have an overall charge of zero.
They are made of metals and nonmetals.
The positive ion must be written first.
Ionic Bonding is the _________ of electron/s between atoms.
sharing
transfer
loose
gain
a type of covalent bond that shares two pairs of electron
single bond
double bond
triple bond
This refers to the tendency of atoms to prefer to have eight electrons in the valence shell
Octet rule
Valence electron
Electronegativity
Lewis symbol
Electron that is located on the outermost shell
proton
neutron
electron
valence electron
Is a way of expressing in symbols the elements present in a compound, as well as the number of atoms of each element present in the compound.
chemical formula
chemical equation
chemical reaction
chemical distribution
Nitrogen, N, will form which of the following ions?
N
N-3
N-5
N+5
What will be the charge of a bromine ion?
+7
-7
-1
+1
The octet rules states that most elements want to have _____ valence electrons.
2
4
6
8
How many valence electrons does Oxygen (O) have?
6
8
15
16
Which two statements are correct about the figure shown?
It is a covalent bond.
Hydrogen atoms loss electrons and Carbon gains the atoms.
It happens on metal and on another non-metal.
The valence electrons are shared by both atoms.
Check all that characterizes an ionic compound.
Hard
non-conductor of heat and electricity
High melting and boiling points
non-soluble in water
Check two general properties of a molecular compound.
Hard
Soft
Low melting point
poor conductor of electricity when in solid state.
Which two are ionic compounds?
NaCl
HCl
CH4
CaO
Which two are molecular compounds?
MgO
Al2O3
CO2
H2O
Chlorine and Fluorine are both very electronegative, as they are both missing a single electron from their valence energy level. Why is Fluorine more electronegative than Chlorine?
Flourine has less energy levels.
Fluorine has more protons.
Chlorine has more electrons in its outer shell.
Chlorine has less protons.
Why do atoms bond?
They typically don't bond
To add or take away energy levels
To have a full valance shell.
To have a full inner shell
Metals have positive ions in a ‘sea of electrons’. Which metal atom provides the most electrons for the sea?
Aluminium
Sodium
Calcium
Magnesium
Which statement describes the structure of copper?
It has a lattice of negative ions in a ‘sea of electrons’.
It has a lattice of negative ions in a ‘sea of protons’.
It has a lattice of positive ions in a ‘sea of electrons’.
It has a lattice of positive ions in a ‘sea of protons’
The structure of copper is described as a lattice of positive ions in a ‘sea of electrons’.
Which statements are correct?
Copper has a high melting point because of the strong electrostatic attraction between the positive ions and the ‘sea of electrons’.
Copper is malleable because the layers of atoms in the lattice can slide over each other.
Copper atoms can be oxidised to form copper ions by losing electrons.
Copper is a metallic element.
Which statements about copper are correct?
Copper is malleable because layers of ions are in fixed positions and cannot move.
The structure of copper consists of negative ions in a lattice.
Copper conducts electricity because electrons can move through the metal.
Electrons hold copper ions together in a lattice by electrostatic attraction.
Which statement about metals is correct?
Layers of positive ions can slide over each other making metals malleable.
Metallic bonding consists of a lattice of negative ions in a sea of delocalised electrons.
Metallic bonding consists of a lattice of positive ions in a sea of delocalised negative ions.
Metals conduct electricity because positive ions are free to move.
The diagram shows metallic bonding.
Which labels are correct?
X: atomic nucleus
Y: outer electron
X: metal atom
Y: mobile electron
X: metal cation
Y: mobile electron
X: positive ion
Y: negative ion
X is a solid at room temperature.
X has a high melting point.
Solid X conducts electricity.
Which diagram shows how the particles are arranged in solid X?
Which properties are all characteristics of ionic compounds?
solids with high melting and boiling points
soft solids which are highly malleable
mostly soluble in water but not in organic solvents such as ethanol
conduct electricity when dissolved in water
Why do ionic compounds NOT conduct electricity when they are in their solid state?
Their ions are free to move.
Their ions are held in fixed positions.
Their electrons are free to move
Their electrons are held in a fixed state
Ionic compounds conduct electricity when dissolved in water. Which statement below best explains the property?
Ions are free to move.
Electrons are free to move.
Bonds are strong.
There are weak intermolecular forces of attraction.
Which three of the following are features of ionic compounds? (click 3 boxes)
They have bonds between metals and non-metals.
They have bonds between two non-metals.
They form simple molecular structures.
They form giant ionic lattices.
They involve the transfer of electrons.
