Why do atoms gain or lose valence electrons?

TO BECOME STABLE Why do atoms gain or lose valence electrons?

Which group of elements are the most stable?

NOBLE GASES Which group of elements are the most stable?

Why are noble gases stable?

THEY HAVE A FULL SHELL OF VALENCE ELECTRONS Why are noble gases stable?

What does each dot represent in an electron dot diagram?

EACH DOT REPRESENTS A VALENCE ELECTRON. What does each dot represent in an electron dot diagram?

Which elements generally have higher ionization energies?

NONMETALS HAVE HIGHER IONIZATION ENERGY THAN METALS, NOBLE GASES ARE HIGHEST Which elements generally have higher ionization energies?

What happens to valence electrons when atoms form ionic bonds?

VALENCE ELECTRONS ARE TRANSFERRED OR GIVEN AND TAKEN. What happens to valence electrons when atoms form ionic bonds?

What are the properties of ionic compounds?

1.SOLID CRYSTALS. 2.HIGH MELTING POINT. 3.BRITTLE. What are the properties of ionic compounds?

Which types of atoms bond to form molecules?

NONMETALS BOND TOGETHER TO FORM MOLECULES Which types of atoms bond to form molecules?

What type of molecule is formed when two atoms of the same nonmetal join together?

DIATOMIC MOLECULE What type of molecule is formed when two atoms of the same nonmetal join together?

What holds atoms together in an ionic bond?

THE ATTRACTION BETWEEN POSITIVE CATIONS AND NEGATIVE ANIONS What holds atoms together in an ionic bond?

What holds atoms together in a covalent bond?

THE SHARED VALENCE ELECTRONS ATTRACT AND HOLD THE ATOMS IN. What holds atoms together in a covalent bond?

What holds metal atoms together in a metallic bond?

THE ATTRACTION BETWEEN A METAL CATION AND THE SHARED SEA OF ELECTRONS What holds metal atoms together in a metallic bond?

Why are metals good conductors of electricity?

THE SEA OF ELECTRONS ALLOWS ELECTRICITY TO PASS THROUGH. Why are metals good conductors of electricity?

Why does water form drops or puddle up?

WATER MOLECULES ARE POLAR AND ARE ATTRACED TO EACH OTHER - COHESION. Why does water form drops or puddle up?

Which types of elements will always form cations or positive ions?

METALS OR GROUP 1A, GROUP 2A AND GROUP 3A Which types of elements will always form cations or positive ions?

Which types of elements will always form anions or negative ions?

NONMETALS, OR GROUP 5A, GROUP 6A AND GROUP 7A Which types of elements will always form anions or negative ions?

In an ionic compound, the positive and negative charges must add up to what sum?

POSITIVE AND NEGATIVE CHARGES MUST ADD UP TO ZERO. In an ionic compound, the positive and negative charges must add up to what sum?

In a chemical formula, which element is written first?

METALS, POSITIVE CHARGES, OR LOWER GROUP NUMBER GO FIRST. In a chemical formula, which element is written first?

When do you need to add a numerical prefix in a chemical name?

WHEN NONMETALS FORM A COVALENT MOLECULE. When do you need to add a numerical prefix in a chemical name?

What does the subscript 2 mean in the formula H 2 O?

THE SUBSCRIPT MEANS THERE ARE TWO HYDROGEN ATOMS. What does the subscript 2 mean in the formula H 2 O?

What do roman numerals such as II, III or IV mean in a chemical name?

A ROMAN NUMERAL INDICATES THE ION’S POSITIVE CHARGE. What do roman numerals such as II, III or IV mean in a chemical name?

What is an alloy?

A MIXTURE OF TWO OR MORE ELEMENTS AT LEAST ONE OF WHICH IS A METAL. What is an alloy?

What are some common alloys?

STEEL – IRON AND CARBON. BRASS – ZINC AND COPPER. AIRCRAFT ALUMINUM – ALUMINUM AND MAGNESIUM. What are some common alloys?