WorksheetsReview for Basics Quiz #12
Total questions: 20
Worksheet time: 11mins
A student mixes 12 grams of salt with 8 grams of water in a beaker. What should be the total mass of the mixture after combining them?
8 grams
20 grams
4 grams
80 grams
Which metal is located in period 3 and group 2 of the periodic table?
Magnesium
Calcium
Sodium
Potassium
What is the atomic number of Sodium?
23
11
1
3
During an endothermic process, what happens to the energy in the surroundings?
It is taken in by the reaction
It is given off by the reaction
Breaking a sugar cube into smaller pieces speeds up its dissolution in water because it increases the ______ compared to the whole cube.
surface area
volume
density
Bubbles form when two or more substances are combined is a (a)
Chemical Change
Physical Change
How many atoms of chlorine are in a unit of calcium chloride whose formula is 6CaCl3?
3
6
18
2
Which group of elements have full energy levels and are considered stable?
Halogens
Alkaline Earth Metals
Alkali Metals
Noble gases
____ reactions usually feel cold.
endothermic
exothermic
_____ reactions usually feel hot!
endothermic
exothermic
