Elements, Compounds and Mixtures (2)

True or False? Compounds can be broken down into simpler substances.

Answer explanation

True. Compounds are substances formed from two or more elements chemically bonded together. They can be broken down into simpler substances, such as elements or simpler compounds, through chemical reactions.

True or False, Compounds and elements are found on the periodic table?

• True

• False

Answer explanation

The statement is False because the periodic table only lists elements, not compounds. Compounds are formed from elements but are not represented on the periodic table.

What is the chemical formula for sugar?

Answer explanation

The chemical formula for sugar, specifically glucose, is C6H12O6. This formula indicates that each molecule of glucose contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.

Tags

NGSS.MS-PS1-1

The formula for sugar and that it is a compound?

• C6 H12 O5

• C6 H12 O6

• CO2H5

Answer explanation

The correct formula for sugar, specifically glucose, is C6H12O6. This compound consists of six carbon atoms, twelve hydrogen atoms, and six oxygen atoms, making it a simple sugar and an essential carbohydrate.

Tags

NGSS.MS-PS1-1

Why is Carbon considered an element while carbon dioxide is considered a compound.

• The are both elements

• Both are heterogeneous mixtures

• Elements always exist as separate atoms and compounds consist of two or more different atoms

• Carbon is a pure substance while carbon dioxide is a mixture

Answer explanation

Carbon is an element because it consists of only one type of atom. In contrast, carbon dioxide is a compound made up of two different types of atoms: carbon and oxygen, thus fitting the definition of a compound.

True or False: Electrons and Protons both reside inside the nucleus of an atom?

• False

• True

• It depends on the element

Tags

NGSS.MS-PS1-1

Which one of these listed below is a compound?

• Water

• Hydrogen

• Gold

• Helium

Answer explanation

Water is a compound made of two hydrogen atoms and one oxygen atom (H2O). In contrast, hydrogen, gold, and helium are elements, not compounds.

Tags

NGSS.MS-PS1-1

The formula for sugar and that it is a compound?

• c6hh12O6

• C6H12O6

• C6O6H12

Tags

NGSS.MS-PS1-1

The formula for iron (III) oxide?

Answer explanation

The formula for iron (III) oxide is Fe2O3. This indicates that there are two iron (Fe) atoms and three oxygen (O) atoms in the compound, which is consistent with the oxidation state of iron in this oxide.

Tags

NGSS.MS-PS1-1

If a drink container tells you to "SHAKE WELL" before drinking, the mixture in the container is most likely a:

• Collid

• Suspension

• Homogeneous Mixture

• Pure Substance

Answer explanation

A "SHAKE WELL" instruction indicates that the mixture is not uniform and may separate over time. This is characteristic of a suspension, where solid particles are dispersed in a liquid but can settle if not mixed.