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WorksheetsScience Unit Test
Total questions: 20
Worksheet time: 16mins
What coefficient for O2 demonstrates the law of conservation of mass?
CH4(g) + __O2(g) → CO2(g) + 2H2O(g)
1
2
3
4
Where are the most reactive nonmetals located on the periodic table?
Period 1
Lanthanide & Actinide
Aikail Metals
Halogens
If 100 grams of vinegar and 5 grams of baking soda are poured in a container, a small amount of gas will be produced. What will the final mass of the products be if the gas is trapped in the container?
95g
104g
100g
105g
A chemical reaction separates water into hydrogen gas and oxygen gas. Which of the following statements is true about the mass of the water and the combined mass of the two gases?
Mass of Water = Mass of Gases
Mass of Gases < Mass of Water
Mass of Water = 2 times the Mass of Gases
Mass of Gases > Mass of Water
Which chemical equation doesn't represtent the Law of Conservation of mass?
2H + O→H2O
2H2+O2→2H2O
CH4+O2→CO2+H2O
CH4+O2→CO2+2H2O
Elements in the periodic table of the elements are organized into columns and rows.
The columns are organized to show the...
number of neutrons in a column.
amount of radioactivity in each group.
similarities of the reactivity in groups
sum of atomic weights per column.
Which shows the Law of Conservaion of this Equation.
Fe2O3 + 3H2SO4 --->
Fe2(SO4)3 + 3H2O
Fe3 + 8(HOS)
HO2 + 4SO4
SO3 + 3H - Fe2
Which statement BEST describes the organization of the periodic table of the elements?
Atomic Nass
Atomic Mass
Simmaler Properties
Different properties
Which statement best explains how the periodic table is organized?
decreasing atomic numbers from left to right
increasing atomc number from right to left
increasing number of neutrons from left to right.
increasing atomic number from left to right
If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?
12 atoms of (C)
6 atoms of (Cl)
12 atoms of (Cl)
6 atoms of (C)
The table shows properties of several elements.
Which element would Element X most likely be grouped with on the periodic table?
Copper (Cu)
Chlorine (Cl)
Potassium (K)
Polonium (Po)
Oxygen (O) reacts with water. Which element is most likely to have a similar effect to sodium if it is exposed to water?
Bromine (Br)
Selenium (Se)
Krypton (K) Its ok superman doesn't do quizziz
Scandium (Sc)
Which element in Period 6 is known to be a highly reactive non-metal?
(Y)
(K)
(Kr)
(At)
One molecule of carbon dioxide (CO2) combines with one molecule of water (H2O) to make one molecule of carbonic acid. According to the Law of Conservation of Mass, how many atoms of carbon should be in the carbonic acid?
1
2
3
7
John and Lisa collected a sample of ocean water and placed it in a jar. Within a couple of days, the water had evaporated and salt was visible at the bottom of the jar. This is an example of a....
physical change
chemical change
solute being dissolved
new substance being dissloved
Sam finds a block made from an unknown element. Which is the best way to determine which element was used to create the block?
test the malleability of the block
determine the mass of the block
calculate the density of the block
observe the reaction between the block and a nonmetal
Borons atomic number is 5. This means that Boron has...
5 neutrons
S protons
6 electrons
9 protons
Where are most metals located?
bottom
top
left
middle
How many electrons are on Neons 1st enery ring?
4
2
1
8
What elemts atomic number is 43?
(Mo)
(Tc)
(Br)
(Mn)
