Periodic table

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

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NGSS.HS-PS1-1

Sodium (Na) is found in group 

• 1
• 2
• 3
• 4

The atomic number tells you what?  READ THE ANSWERS CAREFULLY

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

What does the atomic mass tell you? 

• Basically,the number of electrons and protons
• The number of neutrons
• Basically, the number of protons and neutrons
• The number of protons.

The atoms we study are neutral, which means they have the same number of

• protons and electrons

• protons and neutrons

• electrons and neutrons

The horizontal (side to side) rows in the Periodic Table are called

• groups

• families

• periods

• atomic numbers

one of several forms of a single element, which contains the same number of protons, but different numbers of neutrons

• isotope

• ion

• orbital

• nucleus

Tags

NGSS.MS-PS1-1

Rutherford's experiment showed that most of an atom is made up of _____.

• a nucleus
• an electron cloud
• empty space
• alpha particles

Tags

NGSS.MS-PS1-1