Atoms & Elements

Vertical columns on the periodic table are called ___?

• groups

• periods

• rows

• families

What's a valence electron?

• electrons in the second energy level
• electrons in the outermost energy level
• the atomic number
• electrons in the first level

Tags

NGSS.MS-PS1-1

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

Which color on the image of the periodic table corresponds with the halogens.

• red

• black

• blue

• orange

Which color on the image of the periodic table corresponds with the lanthanides.

• red

• black

• blue

• orange

Which color on the image of the periodic table corresponds with the noble gases.

• red

• black

• blue

• orange

Which color on the image of the periodic table corresponds with the transition metals.

• red

• black

• blue

• orange

Mendeleev first ordered the periodic table of elements by increasing

• atomic number

• atomic mass

• atomic symbol

• atomic weight

Horizontal rows on the periodic table are called ___?

• groups

• periods

• rows

• families

Most metals share four common physical characteristics. Which of the options is not one of the four?

• Luster

• Conductivity

• Ductility

• Malleability

• Reactivity