Periodic Table: Section 1: row/group

How atoms are measured

• balance

• graduated cylinder

• atomic number

• atomic mass unit (AMU)

which tells you the number of PROTONS + number of NEUTRONS

• atomic number

• atomic mass

• atomic mass unit

Which subatomic particle has a positive (+) charge?

• Neutron
• Proton
• Electron

True or False - Protons and Neutrons have about the same mass.

• True - They have about the same mass
• False - They do not have about the same mass

Which subatomic particle has a negative (-) charge?

• Proton
• Electron
• Neutron

The subatomic particles in green are...

• Protons
• Neutrons
• Electrons

Tags

NGSS.MS-PS1-1

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20
• 10
• 5
• 25

Tags

NGSS.MS-PS1-1

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

• 12 neutrons
• 12 electrons
• 12 protons
• 24 protons and neutrons

Tags

NGSS.MS-PS1-1