Atom, Element, Compound, Mixture

An ... is the simplest component.

• atom

• element

• compound

• mixture

Which of these is the correct name of S element?

• Sulfide

• Sulphur

• Sulphate

• Silicon

Which is compound an mixture, respectively?

• sea water and sulfuric acid

• sulfuric acid and sea water

• a cup of tea and handwash

• sodium chloride and water

How many atoms are there in total in a molecule of sodium nitrate, NaNO3?

• two

• three

• four

• six

Which elements are combined in sodium oxide?

• Na and O

• S and O

• So and O

• S and H

Which is the chemical names of H2S?

• Hydrogen Sulfide

• Hydrogen Sulphur

• Hydrogen Sulphate

• Hydrogen Disulfide

What is the chemical formulae for CaO?

• Calcium oxigen

• Kalium Oxide

• Carbon Oxide

• Calcium oxide

What is the chemical formulae for hydrogen gas?

• H

• H2

• H3

• OH

1. A combination of two or more compounds.

2. A combination of substance they aren't chemically bonded together

3. A combination of two or more element

Which are the correct statement about mixture?

• 1 and 2

• 1 and 3

• 2 and 3

• all statements are correct

The combination of glucose and water is a mixture. What is the most correct reason for the statement?

• glucose is compound, water is mixture

• glucose and water are chemically bonded

• glucose and water are compounds

• they are element