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WorksheetsUnit 12 Atoms and the Periodic Table Review
Total questions: 40
Worksheet time: 2hrs 34mins
Protons are important because
they give each element their Identitiy
they exert strong force to hold thenucleus together
they determine the Chemicalreactivity of an atom
They are postively charged particles.
What is the mass number of this atom?
1
3
4
7
What is the mass number of this atom?
13
14
27
40
Atoms of the same element which have a different number of neutrons are called _________________.
ions
isotopes
quarks
molecules
Which subatomic particle has a negative charge in the atom?
proton
neutron
electron
quark
What element has 32 protons?
Sulfur
Selenium
Germanium
Vanadium
The number in Kr-84 represents what about Krypton?
The number of electrons
The number of protons
The mass number
What is the mass number of the isotope of lithium - 8?
8
3
4
5
How many neutrons does the isotope of lithium - 8 have?
8
3
4
5
Calculation used to find the number of neutrons in an atom
Mass Number- Atomic Number
Atomic Number - Mass Number
Mass Number - Electrons
protons = electrons = neutrons
What do these isotopes of carbon all have in common?
neutrons & mass number
atomic number and neutrons
atomic number and protons
protons, atomic number, and mass number
What is the hyphen notation for Magnesium with a mass number of 26?
Magnesium- 12
Magnesium - 26
Magnesium- 24
The top number in this nuclear notation is
The bottom number in this nuclear notation is
An Aluminium-28 isotope contains the following:
15 Protons, 12 Electrons, 12 Neutrons
15 Protons, 12 Electrons, 12 Neutrons
13 Protons, 13 Electrons, 15 Neutrons
13 Protons, 13 Electrons, 16 Neutrons
A Carbon-14 isotope contains the following:
12 Protons, 6 Electrons, 8 Neutrons
6 Protons, 6 Electrons, 8 Neutrons
12 Protons, 8 Electrons, 14 Neutrons
6 Protons, 8 Electrons, 12 Neutrons
Electrons are important because
they give each element their Identitiy
they exert strong force to hold thenucleus together
they determine reactivity and bonding for an atom
They are postively charged particles.
If a neutral atom of sodium has 11 protons how many electrons does it have?
23
11
22
16
How many protons are in Gold
79
197
118
276
What are valence electrons?
The total number of electrons in an atom
The number of electrons in the outermost shell
The number of electrons in the second shell
The number of protons in the outermost shell
The octet rule means that all* atoms want to have how many valence electrons? (*except H and He)
If an element belongs to the Carbon group on the Periodic table, how many valence electrons does it have?
2
3
4
5
How many valence electrons does Helium have?
1
2
3
4
5
How many valence electrons does Oxygen have?
4
5
6
7
8
Iodine has ______ valence electrons
127
53
74
7
How many valence electrons does Nitrogen have?
1
2
3
4
5
Which pair of elements has the most similar chemical properties?
boron and carbon
oxygen and sulfur
aluminum and bromine
argon and silicon
What are the two most reactive groups on the Periodic Table?
Group 1 and 18
Group 2 and 17
Group 1 and 17
Group 18, yeah...just group 18. Boom!
How can we describe this atom?
Very reactive - will steal electrons
Very reactive - will give electrons
somewhat reactive - will steal electrons
unreactive - will not steal or give electrons
How can we describe this atom?
Very reactive - will steal electrons
Very reactive - will give electrons
Somewhat reactive - will give electrons
unreactive - will not give or steal electrons
An atom becomes _________ when it gains electrons.
Positive
Negative
Neutral
An atom becomes _______ when it loses electrons.
Positive
Negative
Neutral
What is the ionic charge of a Calcium ion?
2+
2-
3+
3-
An ion forms when an atom gains or loses _?_.
protons
neutrons
electrons
energy levels
A neutral atom can become an ion with a +2 charge by _?_.
losing two protons
losing two neutrons
losing two electrons
gaining two electrons
