Semester 1 Review

Front

What is scientific notation?

Back

A way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

Front

How do you compare numbers in scientific notation?

Back

Convert them to the same power of ten or compare the coefficients if the powers are the same.

Front

What is the structure of a water molecule?

Back

A water molecule (H2O) consists of two hydrogen atoms covalently bonded to one oxygen atom.

Front

What is the significance of valence electrons?

Back

Valence electrons determine an atom's chemical properties and its ability to bond with other atoms.

Front

Which group of elements is known for being non-reactive?

Back

Noble gases are known for being non-reactive due to their full valence electron shells.

Front

What is oxidation number?

Back

The oxidation number indicates the degree of oxidation of an atom in a compound, representing the number of electrons lost or gained.

Front

How many valence electrons does potassium have?

Back

Potassium has 1 valence electron.

Front

What is the reactivity trend in the periodic table?

Back

Reactivity increases down a group and decreases across a period for metals.

Front

What is a molecular model?

Back

A molecular model is a visual representation of a molecule's structure, showing how atoms are arranged.

Front

What is the oxidation number of nitrogen with 5 valence electrons?

Back

The oxidation number of nitrogen is -3.