Basic chemistry

Which subatomic part of an atom gives it a positive charge?

• Neutron

• Proton

• Electron

• Nucleus

Which region of an atom has a negative charge?

• The nucleus

• Both nucleus and electron cloud

• The neutrons

• The electron cloud

What is the smallest 'building block' of the elements that make up the universe?

• An atom

• An electron

• A proton

• A cell

An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have?

• 0

• 7

• 6

• 13

Tags

NGSS.MS-PS1-1

The number of protons in the nucleus of an atom?

• Isotope

• Atomic mass

• Atomic number

• Element

A certain atom of oxygen contains 8 protons, 8 neutrons, & 8 electrons. Another atom of unknown identity contains 9 protons. Which of the following MUST be true about this unidentified atom?

• It has 9 neutrons in its nucleus.

• It is an isotope of oxygen.

• Its atomic mass is a decimal number.

• It cannot be an atom of oxygen.

Tags

NGSS.MS-PS1-1

An atom of iodine has 7 valence electrons. What will an atom of iodine MOST likely do to be stable?

• Lose 1 electron

• Lost 7 electrons

• Gain 1 electron

• Neither gain nor lose any valence electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An atom of neon has 8 valence electrons. What will an atom of neon MOST likely do to be stable?

• Gain 1 electron

• Lose 2 electrons

• Lose 8 electrons

• Neither gain nor lose any valence electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What type of bond is formed when atoms share electrons?

• Covalent

• Ionic

• Hydrogen

• Polyatomic

Tags

NGSS.MS-PS1-1

How are ionic and covalent bonds alike?

• They both form organic molecules.

• They both fill outer electron shells.

• They both transfer electrons from one atom to another.

• They both transfer protons from one atom to another.

Tags

NGSS.HS-PS1-2