Chemistry STAAR Review Category 1 JH

Front

What are the chemical properties of sulfur, S?

Back

Sulfur is a non-metal that typically forms compounds with metals and non-metals. It has a valence of 2, 4, or 6 and commonly forms sulfide and sulfate ions.

Front

Which element has chemical properties that are most similar to sulfur?

Back

Selenium, Se is chemically similar to sulfur due to its position in the periodic table and similar valence electron configuration.

Front

How many neutrons are in magnesium (Mg)?

Back

Magnesium has 12 neutrons.

Front

What is the atomic number of magnesium?

Back

The atomic number of magnesium is 12, which means it has 12 protons.

Front

How many atoms of Iron are in the compound Fe2O3?

Back

There are 2 atoms of Iron in the compound Fe2O3.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created nor destroyed in a chemical reaction.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

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 a substance formed when two or more different types of atoms bond together.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number, which shows periodic trends in properties.