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WorksheetsChemical Bonds
Total questions: 12
Worksheet time: 10mins
What are valence electrons?
sum of the protons and neutrons
protons minus electrons
electrons in the inner shells
electrons in the outer shell
If an atom has 7 protons and 7 electrons, its electric charge is ---
-7
-14
0
+7
Atoms form compounds to become more ---
reactive
stable
explosive
toxic
An atom of Neon complies with the Octet Rule because it has ___ electrons in its outer shell.
10
8
2
7
Which of the following describes covalent bonds?
Bonds form because of opposite charges
electrons are shared to fill outer electron shells
Electrons are transferred between atoms
Covalent bonds are magical
What is the octet rule?
it states atoms need to be happy
it states atoms need 8 valence electrons to be stable
it states atoms need 6 valence electrons to be stable
it states atoms need to share electrons to be stable
Which of these statements is incorrect?
In a water molecule, the hydrogen atom has partially positive charge while the oxygen atom has a partially negative charge.
In an ammonium molecule, the hydrogen has partially positive charge while the N atom has a partially negative charge.
The hydrogen atom of a water molecule is linked by Van der Walls interaction to nitrogen atom of ammonium
Covalent bond is a strong bond while Van der Walls interaction is a weak bond.
Which of these statements incorrect?
Electronegativity is the atom’s affinity for electrons.
The more electronegative an atom is, the less strongly it attracts shared electrons toward itself
The bond between C and H atom in methane is non polar covalent bond.
The bond between H atom and N atom in ammonia polar covalent bond
