Chapter 6 Revision

7ASP Chapter 6 Revision

Multiple Choice

What determines the order of elements on today's periodic table?

• increasing atomic mass

• decreasing atomic mass

• increasing atomic number

• decreasing atomic number

The Modern Periodic Table

• Elements are organised by increasing atomic number

• The atomic number is the number of protons in the atom of that element

• Mendeleev's periodic table used atomic mass instead

Fill in the Blanks

What is the atomic mass of Nitrogen?

An element key shows you information about the element

• He is the symbol, it is the short name for the element

• The smaller, whole number is the atomic number (no. of protons)

• The decimal is the atomic mass

• It also shows if it is a liquid, solid, or gas

Multiple Choice

Which of the following lists of elements form a group on the periodic table?

• Li, Be, B, C, N, O, F, and Ne

• He, Ne, Ar, Kr, Xe, and Rn

• B, Si, As, Te, and At

• Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Ni, and Zn

Groups and periods

• Groups are vertical columns (18 groups)

• Groups of elements share similar properties

• Periods are horizontal rows (7 periods)

• Periods show increasing atomic mass from left to right

Multiple Choice

Which is NOT a property of metals?

• brittleness

• conductivity

• ductility

• luster

Properties of Metals. All metals:

• Have luster (are shiny/reflect light)

• Conduct electricity and thermal energy

• Are ductile (can be pulled into wires)

• Are malleable (can be hammered into sheets)

Multiple Choice

What are two properties that make a metal a

good choice to use as wire in electronics?

• conductivity, malleability

• ductility, conductivity

• luster, malleability

• malleability, high density

Electrical wires

Metals are good for electrical wiring because:

They conduct electricity

They are ductile, so they can be pulled into wire shapes

Fill in the Blanks

Where are most metals on the periodic table? (left/right/middle?)

Types of Elements

• Metals are mostly on the left and in the middle

• Non-metals are mostly on the right

• Metalloids are between metals and non-metals

Fill in the Blanks

Name one metalloid in group 13, 14 or 15 (full name, not just the symbol)

Metalloids

• Metalloids have some properties of metals and some properties of non-metals

• They conduct electricity and thermal energy under some conditions (semi-conductors)

• They are brittle

• They have luster (siny)

• They are not malleable

• They are not ductile

Multiple Choice

Iodine is a solid nonmetal. What is one

property of iodine?

• conductivity

• dull

• malleability

• ductility

Fill in the Blanks

What is the circumference of Lithium? (rounded to the nearest whole number)

Calculating circumference

• The formula is

   $2\pi r$  

• 2 x 3.14 x radius

• For Lithium, the radius is 152pm

• 2 x 3.14 x 152 = 954.56 pm

Fill in the Blanks

What is the atomic mass of calcium?

Multiple Choice

Which element is most likely to react with

potassium?

• bromine

• calcium

• nickel

• sodium

Metals and halogens react easily

Two metals do not react with each other. Calcium, nickel and sodium are metals.

Bromine is a halogen, they react with metals very easily to form a salt.

Multiple Choice

Which group of elements can act as semiconductors?

• halogens

• metalloids

• metals

• noble gases

Open Ended

How do density and atomic mass change as

atomic number increases?

Atomic number, atomic mass and density are related

As one of them increases, they all increase.

As one of them decreases, they all decrease.

Multiple Choice

Which elements have high densities, strength,

and resistance to corrosion?

• alkali metals

• alkaline earth metals

• metalloids

• transition metals

Transition Metals

• Strong

• Good conductors

• Malleable

• Hard and tough, high density

• Resistant to corrosion

• This makes them good for building with

Fill in the Blanks

What is the name of group 17 on the periodic table?

Multiple Choice

Which is a property of the halogens?

• They are conductors

• They are semiconductors

• They are non-reactive

• They react easily with other elements

The Halogens

• Halogens are elements that can react with metals to form a salt

• They are very reactive and easily form compounds

• They do not exist as free elements

Fill in the Blanks

Which group is the least reactive on the periodic table?

The noble gases (group 18)

• They are very unreactive

• They do not form compounds naturally

• These elements only react with others under special conditions in a laboratory