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WorksheetsUnit 1 Test Review: Periodic Table, The Atom, & The Mole (Adv)
Total questions: 24
Worksheet time: 12mins
Which of the following statements regarding subatomic particles is incorrect?
The relative mass of the proton, electron, and neutron are the same.
Which subatomic particle is used to identify the atom, as it never changes?
protons
neutrons
electrons
How many neutrons does this bromine atom have?
35
45
80
115
Calcium-39; the "39" after the hyphen (-) tells us that Calcium...
has 39 protons
has a mass number of 39
has 39 neutrons
has a charge of -39
How many electrons are in an atom with an Atomic Number of 34, Mass Number of 74, and a charge of -2?
34
36
2
40
Atoms of the same element with differing numbers of neutrons are _______________.
isotopes
ions
elements
nucleus
What scientist proposed this atomic model?
Dalton
Thomson
Rutherford
Bohr
This scientist was the first to claim that the atom is mostly large empty space with a small, dense nucleus at the center
Dalton
Thomson
Rutherford
Bohr
Which atomic model represents Carbon-14?
Mendeleev was the first person to arrange the elements into a table. How did he arrange the rows?
How many periods are on the periodic table?
5
6
7
8
Find an element with similar chemical properties to Barium (Ba).
Ca an Ra, because they are in the same group.
K and Kr, because they are in the same period.
Ca and Y, because they are located close to each other but not in the same group or period.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average atomic mass of this element?
They are all the same
Calculate the molar mass of Ba(C2H3O2)2
255.3 g/mol
237.3 g/mol
228.3 g/mol
196.3 g/mol
A sample of silver contains 5.71 x 1022 atoms. How many moles of silver are present?
3.43 x 1046 moles
0.0529 moles
0.0948 moles
10.5 moles
How many moles are in 50 grams of Calcium Bromide, CaBr2?
0.75
1.25
0.25
0.55
Calculate the number of oxygen atoms in 2.00g of Al2O3.
7.08x1022 atoms
2.36x1022 atoms
1.42x1023 atoms
3.54x1022 atoms
