The periodic Table

Consider the elements in the periodic table. As we move to the far right, the purple column is made up of _________ that are __________.

• gases; highly reactive

• metalloids; reactive

• metals; nonreactive

• gases; nonreactive

At the center of every atom lies a small, dense ____________ that is positively charged.

• cloud

• neutron

• nucleus

• orbital

• They are all about the same mass.

• They are chemically reactive in a similar way.

• The size of the atom decreases as you go down the column.

• The elements change from metals to nonmetals as you go down the column.

An atom of the element ____________has an average atomic mass of about 7 amu.

• Oxygen

• Lithium

• nitrogen

• no elements have that mass

Tags

NGSS.MS-PS1-1

Elements in the same group/family of the periodic table are similar in what way?

• They are all metals

• They are all nonmetals

• They have a full outer shell of electrons.

• They have the same number of valence electrons.

The periodic table has 7 periods. As you go from the top period to the bottom period, what increases?

• Valence electrons

• energy levels

• nothing

• reactivity

All elements in period 7 of the periodic table contains 7 ___________.

• energy levels

• Valence electrons

• total electrons

• protons

Which group of elements are considered to be some of least reactive elements on the periodic table?

• Group 1 (Alkali metals)

• Group 2 (Alkaline Earth metals)

• Groups 3-12 (Transition metals)

• Group 18 (Noble Gases)

Metalloids are unique elements that...

• share the properties of metals and nonmetals

• all have the same number of valence electrons

• are not conductors of electricity

• are not very useful in the production of goods

Elements, which can be normally found in a gaseous state, are found on the _________.

• top left of the periodic table

• bottom left of the periodic table

• middle of the periodic table

• top right of the periodic table

Tags

NGSS.MS-PS1-4