Atom Structure (practice #2)

Which of the following is a substance that can not be broken down into a simpler substance?

• Isotope
• Element
• Compound
• Atomic Number

A pure substance made of only one kind of atom is _______________

• element

• mixture

• compound

• all matter

Matter ______________________________________

• takes up space only

• has mass only

• takes up space and has mass

• is never made up of atoms

Subatomic particles are

• protons

• electrons

• neutrons

• all of the above

All matter is made of what?

• energy

• atoms

• electrons

• compounds

Most of the mass in an atom is concentrated in the ____________________

• electrons

• nucleus

• protons

• empty space

The central region of an atom where its neutrons and protons are is its ____________________

• nucleus

• electron cloud

• core

• center

The smallest part of an element is ___________________________

• atom

• molecule

• electron

Tags

NGSS.MS-PS1-1

How many protons, electrons and neutrons does an neutral atom of Calcium have? Its atomic number is 20 and the mass number is 40.

• 20 protons, 18 electrons and 40 neutrons

• 20 protons, 20 electrons and 20 neutrons

• 40 protons, 40 electrons and 20 neutrons

• 20 protons, 18 electrons and 20 neutrons

Tags

NGSS.MS-PS1-1

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• Electrons and megatrons

Tags

NGSS.HS-PS1-8