Atoms and Periodic Table

The up and down rows on the periodic table are called

• Groups

• Periods

• Rows

• Noble gases

What kind of charge do electrons have?

• Positive charge

• No charge

• Negative charge

• Electric charge

How do you find the number of neutrons?

• Mass number - Atomic number

• Protons + Neutrons

• Protons + Electrons

• Mass number + Atomic number

Who organized the periodic table by atomic mass?

• Moseley

• J.J. Thomson

• Bohr

• Mendeleev

What are electrons in the outermost energy level called?

• Valence electrons

• Valence protons

• Valence neutrons

• Electron cloud

What has both metal and nonmetal properties?

• Electrons

• Metalloids

• Protons

• Metals

If an atom has an atomic mass of 27 and an atomic number of 13, how many neutrons does it have?

• 13

• 15

• 14

• 12

Tags

NGSS.MS-PS1-1

The majority of elements on the periodic table are

• Nonmetals

• Metalloids

• Metals

Where are Electrons located?

• In the nucleus

• In the electron cloud

• Next to the protons

The number located at the top of an element is the ____.

• Mass number

• Neutrons

• Atomic number

• Symbol