Semester 1

An electron is

• positively charged

• neutral

• negatively charged

Tags

NGSS.MS-PS2-3

atomic number is

• the number of protons

• the number of electrons

• the number of neutrons

• the location of an atom on the periodic table

Atomic Mass is the number of

• protons and neutrons in the nucleus of an atom

• protons and electrons in the nucleus of an atom

• neutrons and electrons in the nucleus of an atom

Tags

NGSS.MS-PS1-1

Conservation of mass means

• all the atoms present before a chemical reaction are not present after

• atoms present before chemical reactions are present after

• new substances and new elements are formed in a chemical reaction

Tags

NGSS.MS-PS1-5

A molecule is

• a singular particle of a particular element

• another name for an element

• 2 or more atoms that are combined

Tags

NGSS.MS-PS1-1

which of the statements on physical changes are correct

• A physical change cannot be reversed

• A physical change is a change in state

• A physical change is a change in form

• A physical change is where new substances are formed

Tags

NGSS.MS-PS1-4

Characteristics of metals on the periodic table are

• they are not able to be oxidised

• they are poor conductors of heat and electricity

• have free electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Water is the product of the reactants:

• oxygen and water

• oxygen and carbon

• hydrogen and oxygen

Tags

NGSS.MS-PS1-5

what is an atom

• smallest part of the universe

• smallest part of a substance

• smallest part of anything

• smallest part of water

Tags

NGSS.MS-PS1-1

protons

• negative charge, nucleus

• positive charge, shells

• positive charge , nucleus

• neutral charge, nucleus