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WorksheetsChemistry basics
Total questions: 21
Worksheet time: 22mins
what are the best definitions for a valence shell
The shell that can hold the most electrons
The shell of an atom that is furthest from the nucleus.
The outermost occupied shell of an atom that contains the most energy.
The shell that can hold 18 electrons
What is the best definition for Ionic bonding?
What is the best definition for an Ion?
a lion
label used for an atom that has a positive or negative charge associated with it.
A negatively charged rabbit
your nan
What is a negatively charged ion called?
a cation
a vegetable
an anion
your mum
A (a) is the best name for an ion with positive charge
What is the best definition for valency?
Specifically, what electrons are involved in chemical reactions?
the electrons on core orbitals/shells
regular electrons
electrons with a negative charge
Valence electrons on the outermost occupied shell
Atoms become chemically unreactive when...
If a valence shell is close to full, it will take _____ to gain a small number of electrons to reach stability rather than to lose the larger number already there.
your mum
more energy
less energy
no energy
What is the best definition for subatomic particles?
When atoms get hot and ready to explode
A minute portion of matter
The smallest unit of matter
Protons, neutrons and electrons
Another word for valency is...
electrons
Charge
power
Uranus
A chlorine atom has 7 electrons in it's valence shell. It will gain one electron to make a full valence shell of 8 electrons and gain stability. By doing this it gains a charge/valency of -1. We call this a chloride Ion, and write it as...
Cl2+
Cl-1
Cl-
Cl1+
The atomic number is...
something you'll never know
the number of protons plus neutrons in an atom
the number of protons in an atom
the number of electrons in an ion
The atomic mass is....
how much your dad weighs
mass of one atom of an element and the number of protons and neutrons added together
The total number of subatomic particles in an atom
the amount of protons there are in an atom
How can you calculate the number of neutrons in an atom just based off of the information that the periodic table provides?
By just knowing
By subtracting the atomic mass from the atomic number
By adding the bottom number to the top number
By subtracting the atomic number from the atomic mass
An Ionic bond is when...
Each row of the periodic table represents a single electron shell being filled up. These rows are called
(a)
A covalent bond is where...
The bond your mum and I have
Atoms share electrons to achieve stability
Atoms donate or receive electrons to achieve stability
Atoms start to enjoy each others company
Select the answer that matches the sentence below:
This bond involves a lattice of cations (positively charged ions) in a sea of delocalised (not to remain with one atom) electrons.
This bond is a covalent bond
This bond is a shared bond
This bond is an ionic bond
This bond is a metallic bond
Each column of the periodic table is called a.... and represents....
group
elements with the same amount of valence electrons, and therefore similar properties.
period
a single electron shell being filled up.
What are isotopes?
this answer
Atoms of the same element that have different numbers of neutrons, but the same number of protons and neutrons.
or this one
