WorksheetsPeriodic Table and Phase Changes
Total questions: 20
Worksheet time: 11mins
What is the most abundant element in the Universe?
Hydrogen
Helium
Carbon
Gold
The Periodic Table of the Elements was first introduced in the 19th century. By whom?
Abraham Lincoln
Dmitri Mendeleev
Albert Einstein
Marie Curie
What is the atomic number of oxygen?
O
8
15.999
Which properties are associated with the group (family) of elements called "Noble Gases", such as helium (He), argon (Ar), neon (Ne) and krypton (Kr)? (multiple selection)
Gaseous at room temperature and atmospheric pressure
Inert (non-reactive)
Extremely reactive
Liquid at room temperature and atmospheric pressure
H, C, N, O are the symbols of Hydrogen, Carbon, Nitrogen, and Oxygen, respectively. These elements are considered as:
Metals
Nonmetals
Transition Metals
Alkali Metals
What is the correct way of writing the chemical formula of water?
H2O
H2O
HO2
HO2
How many atoms of each element are present in a molecule of glucose C6H12O6?
6 atoms of carbon, 12 atoms of hydrogen, and 6 atoms of oxygen
6 atoms of carbon, 12 atoms of hydrogen, and 0 atoms of oxygen
1 atom of carbon, 2 atoms of hydrogen, and 1 atom of oxygen
Pure substances of carbon exist under various forms in the Universe. Which of the following? (multiple selection)
Diamond
Graphite
Carbon dioxide CO2
Fullerene C60
The air we breath is a complex mixture. Which one of the following descriptions is the most accurate?
99% of O2, 1% of other molecules
100% CO2
78% of O2, 21% of N2, 1% of other molecules
78% of N2, 21% of O2, 1% of other molecules
What state of matter is pictured?
Solid
Liquid
Gas
What temperature is a measure of? Choose the most accurate answer.
Average kinetic energy of particles
Average elastic energy of particles
Heat
When the temperature increases, the particles...
speed up and move closer together
speed up and move farther apart
slow down and move closer together
slow down and move farther apart
How would you describe best the motion of particles in a solid?
particles in solids are moving freely around each other.
particles in solids have no motion.
particles in solids are vibrating in place.
During which of the following phase changes is heat energy absorbed by the particles?
liquid to gas
gas to solid
liquid to solid
Is the total number of atoms changing over a phase change (change of state)?
Yes
No
Is the total number of atoms changing over a chemical reaction?
Yes
No
In a beaker sitting on a weighting scale, an ice cube of water is placed in liquid water. The scale reads 128.2 grams. What will indicate the scale after the ice cube has melted?
A value lesser than 128.2 grams
128.2 grams
A value greater than 128.2 grams
A soup is simmering on the stove. Water droplets are accumulating on the wall behind it. Which phase changes are responsible (in correct order)?
1. evaporation | 2. condensation
1. condensation | 2. evaporation
1. evaporation | 2. deposition
1. freezing | 2. deposition
Where are phase changes taking place on this heating curve? (multiple selection)
1
2
3
4
5
The heating curve of a pure substance is shown in the graph. What is its boiling point?
100 C
60 C
-60 C
0 C
