Periodic Table CFA #1 for Part 1, gk, 24-25

AS one move down a group of metals, the reactivity

• increases

• decreases

• remains unchanged

• is not related

Valence electrons are those

• anywhere in the electron cloud

• outside of the electron cloud

• in the outermost energy level

• in the nucleus

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Periodic Law exists perfectly when the elements are arranged in the PT by

• atomic mass

• atomic number

• atomic weight

• their sizes

Mendeleev numbered his PT by

• atomic mass

• atomic number

• atomic radius

• reactivity

The PT was re-numbered in the early 1900s by _____ which is what is used currently.

• atomic mass

• atomic number

• PT location

This man's experiment(s) determined an element's atomic number.

• Mendeleev

• Bohr

• Newton

• Moseley

Only the ____ increase in reactivity when moving down a group.

• metals

• metalloids

• nonmetals

• transition metals