atoms and elements

What is the atomic mass of this element? 

• Potassium
• K
• 19
• 39.098

Tags

NGSS.MS-PS1-1

What is the atomic number of this element? 

• 19
• Potassium
• 39.098
• K

Tags

NGSS.MS-PS1-1

What element is this? 

• Oxygen
• Carbon
• Hydrogen
• Helium

Tags

NGSS.MS-PS1-1

What element is this? 

• Hydrogen
• Helium
• Lithium
• Beryllium

Tags

NGSS.MS-PS1-1

How are the elements arranged on the periodic table?

• Atomic number

• Atomic mass

• Alphabetically

• Chemical symbol

Which of the following is a physical property? 

• flammability
• rusting
• reactivity
• melting point

Use your periodic table to answer the following question.
Which of the following atoms has 14 electrons?

• Carbon (C)
• Silicon (Si)
• Sulfur (S)
• Argon (Ar)

Use the picture of an atom below to answer the question.

Which statement best describes the part of the atom that is shown by the letter B?

• It is an electron, and it has a negative charge.
• It is an electron, and it has a positive charge.
• It is a proton, and it has a negative charge.
• It is a neutron, and it has a neutral charge.

Tags

NGSS.MS-PS1-1

Cobalt (Co) has 27 protons in each atom. Based on this information, which of the following also describes an atom of Cobalt?

• It has no neutrons.
• It has 27 electrons.
• It has 13 neutrons and 14 electrons.
• It has a total of 86 neutrons and electrons.

Tags

NGSS.MS-PS1-1

What kind of charge do neutrons have?

• positive 
• negative
• neutral
• -3