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Trinity High: N5 Unit 1 Bonding Flashcards | StudBud
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Trinity High: N5 Unit 1 Bonding
Trinity High: N5 Unit 1 Bonding
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1
What is the best definition for a diatomic molecule?
2 atoms covalently bonded to form a molecule
2 non-metal atoms covalently bonded to form a molecule
2 different atoms covalently bonded to form a molecule
2 atoms covalently bonded to form a compound
2
What word do we use in National 5 Chemistry to describe the shape of a water molecule?
Angular
Bent
V-shaped
Trigonal Angular
3
Ionic compounds conduct electricity when......
Solid only
molten only
molten and in solution
In solution only
4
What is an ionic bond?
Electrostatic attraction between positive and negative atoms
The attraction between positive nuclei and shared electrons
A big lattice of positive and negative ions
Electrostatic attraction between positive and negative ions
5
How many covalent bonds are present in Ammonia?
3
5
2
6
6
What holds two atoms in a covalent bond together?
The common attraction between the neutrons and the shared pair of electrons
The common attraction between two nuclei and the shared pair of electrons
One neutron is attracted to the opposite atom's electron
One nucleus is attracted to the opposite atom's electron
7
2018 PPQ: The shape of a molecule of Hydrogen bromide is likely to be.....
Linear
Trigonal Pyramidal
Angular
Tetrahedral
8
2018 PPQ: Which of the following elements does not exist as diatomic molecules?
Oxygen
Bromine
Helium
Hydrogen
9
A diatomic Oxygen molecule is shown. What type of bond is present?
A double bond
A single bond
4 bonds
A triple bond
10
A covalent bond forms between which type of atoms?
Metal atoms
Metal and non-metal atoms
Solid atoms only
Non-metal atoms
11
When Chlorine forms an ion, it achieves the same stable electron arrangement of which noble gas?
Argon
Helium
Krypton
Neon
12
Why do covalent molecules have low melting and boiling points?
Strong forces of attraction between the molecules are easily broken
Weak forces of attraction between the molecules are easily broken
Strong forces of attraction between the atoms are easily broken
Weak forces of attraction between the Atoms are easily broken
13
Identify the compound that would be trigonal pyramidal as shown in the diagram.
Methane ( CH4 )
Water ( H2O )
Hydrogen chloride( HCl )
Ammonia ( NH3 )
14
2019 PPQ: Identify the positively charged ion from the table.
C
A
B
D
15
Which elements are diatomic?
H2 N2 O2 Fr2 Cl2 Br2 I2
H2 N2 O2 F2 Cl2 B2 I2
H2 N2 O2 F2 C2 Br2 I2
H2 N2 O2 F2 Cl2 Br2 I2
16
Identify the correct statement about ionic substances.
Ionic substances always conduct electricity
An ionic lattice contains only negative ions
A large network of positive and negative ions forms a lattice
Lots of ions joined up can form molecules
17
2018 PPQ: Which of the following forms an ion with a +1 charge and has an electron arrangement of 2,8?
Neon
Sodium
Magnesium
Fluorine
18
If an atom loses 2 electrons to become stable and achieve a charge on +2, what type of atom is it most likely to be?
Non-metal
Noble gas
Solid
Metal
19
Identify the correct statement.
Most ionic compounds are insoluble in water
Most covalent substances dissolve in water
All covalent substances dissolve in water
Many ionic compounds are soluble in water
20
How are ions formed?
Atoms lose or gain neutrons
Atoms lose or gain protons
Atoms loses or gains electrons
Atoms losing electrons only
21
Identify the incorrect statement about covalent molecules.
Have low boiling points
They conduct electricity as the charged particles are free to move
Have strong bonds within molecules and weak attractions between them
Have low melting points
22
Tennessine is a new element with electron arrangement 2,8,18,32,32,18,7. Which group should it be placed in?
1
2
7
8
23
Why is the following bonding diagram incorrect?
Both electrons should be in the overlap to represent a covalent bond
Chlorine has a valency of 7
Hydrogen's electron should be represented by a dot
Hydrogen and Chlorine atoms can't form a covalent bond
24
Covalent molecular substances generally dissolve best in which type of solvent?
Any solvents
Ionic
Water
Covalent
25
2019 PPQ: In which of the following compounds do the ions have the same electron arrangements?
Na2O
LiF
MgCl2
KBr
26
Identify the ion-electron equation for the sodium atom forming a sodium ion.
Na(s) → Na+(aq) - e-
Na(s) → Na+(aq) + e-
Na+(aq) + e- → Na(s)
Na(s) → Na+(s) + e-
27
An ion has a charge of 3- and has a stable electron arrangement of 2,8,8. What was the electron arrangement of the atom?
2,8,8,3
2,8,5
2,8,6
2,8,8,2
28
Why are the melting and boiling points of diamond extremely high?
Each molecule contains strong covalent bonds
The attractions between the molecules are very strong
The network of strong covalent bonds are not easily broken
The network of strong covalent bonds are easily broken
29
Why do ionic compounds conduct when molten or in solution?
The lattice breaks up allowing the atoms to flow
The nucleus breaks up allowing the ions to flow
The lattice breaks up allowing the ions to flow
The molecules break up allowing the ions to flow
30
Why is this bonding diagram for water incorrect?
There should be another electron on the Oxygen atom
Each Hydrogen atom is missing an electron
There should be two Oxygen atoms and one Hydrogen atom
The atoms should be in a straight line
