Physical Science Review SEM2

Jaime is learning how elements are placed in the periodic table. He must find an element similar to calcium (Ca). Which element will be most similar in physical and chemical properties to calcium (Ca)?

• A. carbon (C)

• B. magnesium (Mg)

• C. potassium (K)

• D. boron (B)

On the periodic table, helium (He) is placed at the top of group 18 (8A). What is the reason for helium being at this location on the periodic table?

• A. Helium has a filled outer energy shell

• B. Helium is a very reactive gas

• C. Helium loses its electrons easily

• D. Helium is a transition metal

The elements shown are in the family known as the halogens. What do the atoms in this family of elements have in common?

• They have the same number of neutrons.

• They have the same number of valence electrons.

• They will form ionic bonds with water molecules.

Tags

NGSS.MS-PS1-1

Two elements in the same group on the periodic table of the elements are most similar in their

• atomic mass

• number of protons

• atomic size

• chemical reactivity

The formation of an ionic bond involves the

• transfer of electrons

• sharing of electrons

• transfer of neutrons

• sharing of protons

Tags

NGSS.MS-PS1-5

Which parts of an atom are reactive during a chemical process?

• electrons

• protons

• neutrons

Tags

NGSS.MS-PS1-5

Which set of elements contains only metals?

• iodine, iron, nickel

• bismuth, antimony, argon

• sodium, chromium, copper

• phosphorus, nitrogen, oxygen

Which best describes chemical synthesis?

• an amount of acid reacting with an equal amount of base

• heat being given off as two elements react with each other

• a compound being broken down into smaller compounds

• two or more elements combining to form a new compound

Use the chemical equation to answer the question that follows. C + O2 → CO2. What type of reaction occurs when carbon dioxide is formed from carbon and oxygen?

• synthesis

• decomposition

• single replacement

• double displacement

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of reaction is shown below? 2KClO3(s) -> 2KCl(s) + 3O2(g)

• A. synthesis

• B. combustion

• C. decomposition