Lowest Performing TEKS BM1 7.7A, 7.6A, 7.6B

Front

What is a molecule of a compound?

Back

A molecule of a compound consists of two or more different types of atoms bonded together. For example, water (H₂O) is a compound made of hydrogen and oxygen atoms.

Front

What is the chemical formula for a compound containing 1 atom of nickel and 2 atoms of fluorine?

Back

The chemical formula is NiF₂.

Front

How many atoms of magnesium are in the compound 10MgCl₂?

Back

There are 10 magnesium atoms in 10MgCl₂.

Front

How many hydrogen atoms are in the compound H₂O?

Back

There are 2 hydrogen atoms in H₂O.

Front

How many oxygen atoms are in the compound H₂O?

Back

There is 1 oxygen atom in H₂O.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element present in the molecule. For example, in H₂O, the '2' indicates there are 2 hydrogen atoms.

Front

What is the significance of the coefficients in a chemical formula?

Back

Coefficients indicate the number of molecules or moles of a substance. For example, in 2H₂O, the '2' means there are 2 molecules of water.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where reactants are transformed into products through the breaking and forming of chemical bonds.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.