What are the basic structural components of a typical atom?

• protons, electrons, and neutrons

• molecules and compounds

• sodium and iron

• protons and neutrons

Tags

NGSS.MS-PS1-1

Use the diagram below to answer the question that follows. 

Which two particles are found inside the nucleus of an atom?

• protons and electrons

• protons and neutrons

• electrons and neutrons

• electrons and protons

Tags

NGSS.MS-PS1-1

A student has a sample of an element.  Which describes a trait the sample must have in order to be considered an element?

• The sample is a liquid at room temperature

• The sample is made of only one type of atom.

• The sample contains different types of particles.

• The sample can be seen only with a microscope.

Match the term to the structure it represents in the model.

• neutron

• C

• electron

• B

• proton

• D

• nucleus

• A

Tags

NGSS.MS-PS1-1

Examine the information for two elements. 

Compare the atomic structure of these two elements by determining which descriptions describe carbon, boron or both. 

Groups:

(a) Carbon

,

(b) Boron

,

(c) Both

• atoms contain six neutrons

  
  

• atoms contain five electrons

• atoms contain six protons

  
  

• atoms contain six electrons

  
  

• atoms contain five protons.

Tags

NGSS.MS-PS1-1

The atoms of an element have the same number of —

• neutrons and electrons

• protons and neutrons

• protons and electrons

• none of these apply

Tags

NGSS.MS-PS1-1

A student sees the diagram below shown in a textbook.

What does the symbol in the diagram represent?

• a compound

• an element

• a molecule

• an isotope

Tags

NGSS.MS-PS1-1

Which answer choice does not represent an element? 

• Si

• H₂O

• K

• Ca

Tags

NGSS.MS-PS1-1

A partial periodic table is shown below. 

  

Match each symbol to the element it represents.  

 

• Na

• Nitrogen

• N

• Calcium

• Ca

• Potassium

• K

• Sodium

This pie graph shows that two different elements make up the largest portion of the Earth's crust.
What elements do A and B most likely represent?

• silicon and oxygen

• nitrogen and oxygen

• carbon and oxygen

• hydrogen and oxygen

Tags

NGSS.MS-ESS3-1

NGSS.MS-PS1-1