Mrs. Clark's 8th Chemistry Review

What particle determine the reactivity of an element?

• proton

• neutron

• electron

• valenece electron

shiny, conducts electricity, malleable and magnetic all describe

• metals

• nonmetals

• metalloids

• semiconductor

Tags

NGSS.MS-PS2-3

what is the difference between the number of electrons in an atom of Sulfur and in an atom of Magnesium

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many neutrons are in the nucleus of an atom of Silicon

• 28

• 28.085

• 14

• 13

Tags

NGSS.MS-PS1-1

• Zn + HCl

• ZnCl +H2

Tags

NGSS.MS-PS1-2

What is the identity of this element?

• carboon

• boron

• lithium

• beryllium

Tags

NGSS.MS-PS1-1

What particle identifies the atom?

• valence electron

• electron

• neutron

• proton

Tags

NGSS.MS-PS1-1

How many proton, neutrons and electrons are present in an atom of Nitrogen with the mass number of 14?

• 7 protons, 8 neutrons, 7 electrons

• 7 protons, 7 neutrons, 7 electrons

• 14 protons, 14 neutrons, 14 electrons

• 8 protons, 6 neutrons, 8 electrons

Tags

NGSS.MS-PS1-1

Change in color, shape, length, density, mass or volume is an example of a ___________ change.

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

What does the word distinguish mean?

• to put out a fire

• tells the difference between