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WorksheetsNote Check: Before, During, and After Mendeleev
Total questions: 20
Worksheet time: 10mins
Which of the following is a halogen?
Sr
Br
Na
Kr
Which of the following is an alkaline Earth metal?
Ca
Cl
K
Ne
Which element belongs in period 3?
Ca
Cl
K
Ne
Which element belongs in family 18?
Ca
Cl
K
Ne
Which element is a non-metal?
Li
V
C
Ba
Which element is a metalloid?
O
Be
Sn
As
Which element is the most chemically reactive metal?
Cr
F
Fr
Mg
What property did Mendeleev use to organize his periodic table, at first?
Atomic Number
Color
Reactivity
Atomic Weight
Which family is likely to form cations?
Alkali metals
Halogens
Noble Gases
Who was the first scientist to attempt to organize elements into groups where they react similarly?
Lavoisier
Dobreiner
Newlands
Mendeleev
Who hypothesized the "Law of Octaves"?
Lavoisier
Dobreiner
Newlands
Mendeleev
Mendeleev knew of the existence of protons.
True
False
Which electron will have the most energy?
one in the first energy level
one in the second energy level
one in the third energy level
one in the fourth energy level
How many electrons can be held in the 6th energy level?
6
24
72
It's impossible to tell
How many valence electrons does this atom have?
1
2
7
9
Which energy level are the valence electrons in in this atom?
1st
2nd
3rd
4th
Potassium is in the 4th period. Where are its valence electrons located?
1st energy level
2nd energy level
3rd energy level
4th energy level
Potassium is in the 4th period. Where are its valence electrons located?
1st energy level
2nd energy level
3rd energy level
4th energy level
Calcium is in the second family. How many valence electrons will it have?
1
2
3
4
Who was the first scientist to discover a new element through experimentation?
Brand
Newlands
Dobreiner
Bohr
