Chemistry STAAR Review

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

• Neutral particles and positively charge particles

• Positive charge particles only

• Negatively charge particles and positively charge particles

• Negatively charge particles only

Where is most of the mass in an atom located?

• in the nucleus

• in the protons

• in the neutrons

• in the electrons

Tags

NGSS.MS-PS1-1

What is the mass number?

• the number of protons in the nucleus

• the sum of the number of protons and neutrons in the nucleus

• the number of electrons outside the nucleus

• the number of neutrons in the nucleus

What is the product of a chemical reaction between an acid and a base?

• Salt

• Water

• Both A and B

• Carbon dioxide

Which element has chemical properties that are MOST similar to the chemical properties of Sulfur?

• Silicon

• Chlorine

• Selenium

• Phosphorus

Which of the following is a chemical change?

• Dissolving salt in water

• Boiling water

• Burning wood

• Melting ice

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the term for the amount of matter in an object?

• Weight

• Density

• Mass

• Volume

Which of the following is a chemical property of matter?

• Color

• Density

• Flammability

• Melting point

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

This element is oxygen. Which other element reacts like the atom in the picture sulfur or nitrogen? How do you know?

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What part of the atom determines the identity of an atom?

• Electrons

• Neutrons

• Protons

• Nucleus