Periodic table 7th Grade

Which of the following is NOT true about the periodic table?

• Atomic mass is equal to the number of neutrons.

• Elements listed by their (increasing) atomic mass.

• Groups are the elements listed in columns.

• Periods are the elements listed in rows of 8 (for most rows).

The outer most negatively charged particles of an atom are known as what?

• electrons
• protons
• neutrons
• valance electrons

Tags

NGSS.MS-PS1-1

The most reactive nonmetals are ones with

• 2 valence electrons

• 7 valence electrons

• 8 valence electrons

• 9 valence electrons

These two subatomic particles contribute to the mass of the atom.

• Protons and Electrons

• Protons and Neutrons

• Electrons and Neutrons

What statement about a proton is correct?

• A proton has no electrical charge

• A proton has a positive electrical charge

• A proton has a negative electrical charge

• A proton can have either a positive or a negative electrical charge

What types of particles are found in the cloud surrounding the atom's nucleus?

• Positively charged particles and negatively charged particles

• Negatively charged particles only

• Neutral particles and positively charged particles

• Positively charged particles only

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

• groups

• towers

• periods

• atomic numbers

Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

the positively charged subatomic particle contained in the nucleus of an atom

• proton

• neutron

• electron

• matter

Tags

NGSS.MS-PS1-1

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.

Tags

NGSS.MS-PS1-1