WorksheetsOctober Review
Total questions: 15
Worksheet time: 9mins
How many moles of He are in 2.17x10^3 grams?
(a)
What formula do I use if I want to calculate how many atoms are in 2.38 moles of potassium?
(# of atoms/ 6.022 x 1023) (MW)
( #of moles) (MW)
(g / MW) (6.022 x 1023 )
( # moles) (6.022 x 1023 )
How many grams are in 1.6 x 106 moles of Tungsten? (MW= 184)
(a)
The atomic number is equal to what of that element?
# of electrons
# of Neutrons
Valence electron Number
Ion number
6.022 X1023 represents what?
one mole
Molar mass
Avogadro's number
Average atomic mass
Which is the correct hyphen notation of an element with atomic number 2 and mass number 4
oxygen-4
helium-4
Potassium-4
Hydrogen-4
How many protons, electrons and neutrons does Si-29 have?
14,14,14
14,14,15
14,14,16
14,14,17
A finite quantity of energy gained or lost by an atom is known as
electromagnetic radiation
wavelengh
quantum
frequence
What specifies the properties of atomic orbitals and the properties of electrons in orbitals?
Quantum numbers
orbits
Lewis structures
electron configurations
The arrangement of electrons in an atom is known as
quantum numbers
orbitals
Lewis structures
electron configuration
The group 18 elements are
Noble gases
metals
nonmetals
metalloids
[Ar]3d14s2 is the noble gas notation for which element?
Calcium
Scandium
Titanium
Vanadium
Which is the correct noble gas notation for Manganese (Mn)
[Ar]4s23d3
[Ar]4s13d5
[Ar]4s23d5
[Ar]4s23d6
Which element has the following electron configuration; 1s22s22p63s23p3
As
S
K
P
Which element contains 4 electrons in its third and outer main energy level
As
S
K
P
