year 10 term 1 midterm revision

What elements generally make an ionic bond?

• metal and nonmetal
• 2 or more nonmetals
• metal
• none of the above

What elements generally make a covalent bond?

• metal and nonmetal
• 2 or more nonmetals
• metal
• none of the above

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In chemical compounds, covalent bonds form when

• the electronegativity difference between two atoms is very large.
• electrons are completely transferred between two metals.
• pairs of electrons are shared between two nonmetal atoms.
• two nonmetal atoms are attracted to each other by opposite charges.

An ionic bond forms when 

• Valence electrons are shared
• a sea of mobile electrons surround the cations
• valence electrons are transferred between atoms
• none of the above

Tags

NGSS.MS-PS1-5

What is a valence electron?

• an electron that is found in the outermost shell of an atom. 
• an electron found in the innermost shell of an atom.
• an electron found in the middle shell.

What happens to the ions in ionic compounds when they are separated or dissolved?

• They allow the solution to conduct electricity

• They become solid

• They evaporate

• They do not conduct electricity

What type of bond is formed when electrons are transferred?

• Covalent

• Ionic

• Metallic

• Hydrogen

What type of bond will conduct electricity in a dissolved state?

• ionic

• covalent

What is the basis of a metallic bond?

• the attraction of neutral metal atoms.
• the attraction between protons and neutrons.
• the attraction between positive metal ions and interlocking electrons.
• the attraction between positive metal ions and free floating electrons.

Electrons that are free to move in metals

• delocalized electrons
• oxidation number
• chemical bond
• salts