Chemistry Basics

What type of change is ripping paper?

• Physical

• Chemical

Answer explanation

you haven't changed the chemical properties of the paper, only changed the size and shape

What type of change is burning wood?

• Physical

• Chemical

Answer explanation

a new substance is formed- smoke and ash are produced from this change

Tags

NGSS.MS-PS1-2

What type of change occurs when silver tarnishes?

• Physical

• Chemical

Answer explanation

a new substance is formed- tarnish

Tags

NGSS.MS-PS1-2

What type of change occurs when sugar is dissolved in water?

• Physical

• Chemical

Answer explanation

no new substance is chemically created- sugar water can be separated

Tags

NGSS.MS-PS1-2

What part of the atom is positive (+)?

• electrons

• protons

• neutrons

Tags

NGSS.MS-PS1-1

What part of the atom is negative (-)?

• electrons

• protons

• neutrons

Tags

NGSS.MS-PS1-1

What part of the atom is neutral?

• electrons

• protons

• neutrons

Tags

NGSS.MS-PS1-1

What parts of the atom are in the nucleolus?

• electrons and protons

• protons and neutrons

• neutrons and electrons

Tags

NGSS.MS-PS1-1

How many protons does one atom of Beryllium have?

• 4

• 5

• 9

• 9.0122

Answer explanation

the atomic number (at the top of the square) is equal to the number of protons

Tags

NGSS.MS-PS1-1

How many electrons does one atom of Beryllium have?

• 4

• 5

• 9

• 9.0122

Answer explanation

the number of protons is equal to the number of electrons in a stable atom

Tags

NGSS.MS-PS1-1