Physical Science Test

Why are metals good conductors of electricity?

Electrons are free to move among the metal cations.

Ionic bonds are formed when electrons are _______ between atoms.

transferred

Using electron dot diagrams, show how two hydrogen atoms chemically bond.

H:H

What type of bond is formed when two metals combine.

Metallic

Using electron dot diagrams, show how sodium (Na) combines with chlorine (Cl) to form sodium chloride. Is this an ionic compound, or a covalent compound?

Na loses one elctron to form Na , Chlorine gains one electron to fform Cl , This is an ionic compound.

Which of the above elements is most stable?

Neon

What type of bond is formed when two non-metals combine?

covalent

Metallic compounds are very ______ when struck with a hammer.

malleable

Metallic bonds are formed between elements that are _______.

metals

What type of bond is found in water, H 0?

polar covalent

Covalent bonds are formed when electrons are _______ between atoms.

shared

Which of the above elements is most likely to gain electrons to become more stable?

Fluorine

What is the idfference between polar and non-polar bonds?

In non-polar bonds, electrons are shared equally. In polar bonds, electrons are not shared equally.

What type of bond is formed when a metal combines with a non-metal?

Ionic

Write an electron dot diagram for litium, florine, and neon.

Li with one dot, F with seven dots, Ne with eight dots

Which of the above elements is most likely to lose electrons to become more stable?

Lithium

What does the number "2" in the formula MgCl mean?

There are two chlorine atoms for every magnesium atom.

When an atom gains electrons, it becomes an ______.

anion

Ionic compounds are very ______ when struck with a hammer.

brittle

When an atom loses electrons, it becomes a ______.

cation