The Modern Periodic Table of Elements is arranged by

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

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

• groups

• towers

• periods

• atomic numbers

What does the 6 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

Tags

NGSS.MS-PS1-1

What does 12.011 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

Tags

NGSS.MS-PS1-1

________________ is an arrangement of elements by their atomic numbers, usually in rows, so that elements with similar atomic structure (and therefore similar chemical properties) appear in vertical columns.

• The Periodic Table of Elements

• Atomic Theory

• Isotopes

• Subatomic Particles

A subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge is called a(n) _________.

• proton

• neutron

• electron

• matter

The positively charged subatomic particles contained in the nucleus of an atom are called _____________.

• protons

• neutrons

• electrons

• matter

A negatively charged subatomic particle that orbits the nucleus of an atom is called a(n) _______________.

• proton

• neutron

• electron

• matter

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

An atom with 3 valence electrons "wants" a full shell, so it can either gain 5 or lose 3. Which is more likely to occur?

• Gain 5

• Lose 3

• Nothing