Atoms - 8th Grade Assessment

What type of charge do protons have? (T1)

• no charge

• positive charge

• negative charge

• neutral charge

What is contained in the nucleus of an atom? (T1)

• electrons and protons

• valence electrons

• electrons and neutrons

• protons and neutrons

Tags

NGSS.MS-PS1-1

Label the subatomic particles of the atom. (T1)

A.)

B.)

C.)

D.)

Tags

NGSS.MS-PS1-1

Democritus was a Greek philosopher that first provided information about the atom in 430 BCE. It wasn't until 1932 when John Chadwick, an English scientist introduced the neutron. Why do you think it took so long for the neutron to be discovered? (T2)

Chlorine is an element on the Periodic Table of Elements. Chlorine is considered an isotope. What is the difference between an isotope and the other elements on the Periodic Table? (T2)

Tags

NGSS.MS-PS1-1

Rubidium (Rb) is an alkali metal. How many protons does it contain? (T2)

Tags

NGSS.MS-PS1-1

What is the difference between an electron and a valence electron? (T3)

Tags

NGSS.MS-PS1-1

We have a new student in our class who does not understand how to calculate the number of neutrons in an atom. She knows the atomic mass and the atomic number. Explain to this student how to figure how many neutrons are in the element. Do not just put the formula. EXPLAIN! (T4)

The Periodic Table does not contain the number of electrons in an element. How can we use the table to figure out how many electrons are in an element?

How many valence electrons does neon (Ne) have? How do you know? (T3). EXPLAIN

Tags

NGSS.MS-PS1-1