Chemistry

How are elements in the periodic table organized?

• Alphabetically

• Based on physical and chemical properties

• Increasing number of electrons

• Most reactive to least reactive

most elements on the periodic table are classified as __________.

• Gases

• Metalloids

• Metals

• Nonmetals

Groups on the periodic table are arranged vertically.

• True

• False

Which accurately describes nonmetals?

• Poor conductors of electricity

• Often used in computer parts

• Both malleable and ductile

• Always solid at room temperature

Which group on the periodic table is the most reactive?

• Alkali metals

• Alkaline-earth metals

• Transition metals

• Halogens

Which group of elements is un-reactive?

• Noble Gases

• Inner transition metals

• Transition metals

• Alkaline-earth metals

Which properties most accurately describe the element silicon (Si)?

• Highly conductive, solid at room temperature

• Weak conductor of electricity, solid at room temperature

• Poor conductor, transparent

• Ductile and malleable

How many periods are there in the periodic table?

• 7

• 9

• 10

• 18

Which group of elements does not melt or change when placed in fire?

• Alkali metals

• Alkaline-earth metals

• Halogens

• Noble gases

Which group of elements on the periodic table are all gases at room temperature?

• Alkali metals

• Metalloids

• Halogens

• Noble gases