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WorksheetsUnit 1 Test 2 Review (Reactivity and Valence Electrons)
Total questions: 51
Worksheet time: 1hrs 20mins
Which of the following is MOST reactive?
Lithium
Lead
Tin
Copper
Which metal is more reactive than calcium?
magnesium
potassium
silver
aluminum
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
Which elements have the most similar chemical properties?
boron and carbon
oxygen and sulfur
aluminum and bromine
argon and silicon
What element contains 7 protons and 5 valence electrons?
Boron
Vanadium
Nitrogen
Lithium
A student is shown a picture of the atom to the side. What element, based on the subatomic particles in the atom, is shown?
Beryllium
Lithium
Helium
Oxygen
The atomic number of an element is equal to its number of protons. Therefore, a logical conclusion is that the number of protons determines an element’s-
Mass and atomic weight.
The number of stable isotopes.
Identity
State of matter
Compare the data shown in the table. What reasonable conclusion can be made from the information given?
Element 1 has the same atomic mass as Element 4
Element 3 has a very similar chemical properties as Element 4
Element 1 has very similar chemical properties as Element 3
None of the above
Tin, Sn, is a soft white metal. It has a low melting point compared with other metals. Tin is widely used as a coating for cans of food. Which statement accurately describes atoms of tin?
Tin atoms have 50 protons.
Tin atoms have five valence electrons.
Tin atoms have 119 neutrons.
Tin atoms have 68 electrons.
The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?
The element is fluorine, and it is not very reactive.
The element is sodium, and it is not very reactive.
The element is sodium, and it is highly reactive.
The element is fluorine, and it is highly reactive.
Students were asked to identify the location of elements in the periodic table based on clues printed on game cards.
Based on the data, which periodic table shows the correct location of the four elements?
How many valence electrons are found in atoms of group 14?
4
3
14
16
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
All atoms are most stable with (or would "prefer") how many electrons in their valence shell?
1
2
8
18
What group is the most reactive metals?
2
18
1
16
What group is the most reactive non metals?
1
17
2
1
Why are halogens so reactive?
They want to get rid of their only valance electron
They only need one more electron
They are non reactive, they have a full shell
How do electrons of an element determine that element's reactivity?
If the valence shell has missing electrons it is very reactive to attract or lose more electrons.
If the valence shell has a full ring of electrons it is very reactive because it needs more.
If the valence shell has a full shell of electrons it is very reactive because it is already full.
If the valence shell has missing electrons it is not reactive because it is missing electrons.
Appear Vertically on the periodic table
Periods
Groups
Energy Levels best describe .....
Periods
Groups
Elements that are similar in chemical reactivity
Periods
Groups
This element is a non metal, stable atom that will not bond with other elements.
It has 5 electron shells.
(a)
These elements are gaseous at room temperature, chemically stable with 8 valence electrons.
What group of elements is this describing?
Choose 2 correct answers!
Alkali metals
Group 1
Halogens
Group 18
Noble Gases
Using the blank periodic table:
Which elements would have the same number of energy shells as element G?
A
B
C
D
E
Using the blank periodic table:
Which elements would have the same number of valence electrons as element D?
C
K
L
H
Using the Atom Models:
Which atoms are in the same group as Atom 5?
There are 2 correct answers
2
6
8
12
10
Using the Blank Periodic Table:
Which elements would be highly reactive?
(a) (b) (c)
Using the Blank Periodic Table:
Which elements would have similar chemical properties as element A?
A
B
F
G
H
What element is the only nonmetal with 4 valence electrons?
Carbon
Oxygen
Xenon
Magnesium
What groups are the most reactive metals?
2 and 3
1 and 18
1 and 2
16 and 17
What groups are the most reactive non metals?
1 and 2
16 and 17
2 and 17
1 and 16
What determines an element's chemical reactivity?
protons
electrons
neutrons
valence electrons
Identify number 16 on the periodic table square below.
atomic mass
element name
chemical symbol
atomic number
A student has to select an element that is a poor conductor of heat and electricity. Which element should they choose?
Br
Cd
Na
Ti
Using the blank periodic table:
Which elements would have the same number of energy shells as element G?
A
B
C
D
E
Using the Atom Models:
Which atoms are in the same group as Atom 5?
There are 2 correct answers
2
6
8
12
10
Using the Blank Periodic Table:
Which elements would be highly reactive?
(a) (b) (c)
Which two elements are in the same period?
Lithium (Li) & Magnesium (Mg)
Boron (B) & Carbon (C)
Potassium (K) & Sodium (Na)
Which two elements would have the same number of energy levels(shells)?
Copper (Cu) and Zinc (Zn)
NIckel (Ni) and Palladium (Pd)
Magnesium (Mg) & Lithium (Li)
