8th Grade Science; Unit 3 Review (Chemistry) 2017-18

Which particle does not add to the mass of the atom?

• Proton

• Neutron

• Electron

• Nucleus

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

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

• nucleus 
• electron cloud
• core 
• center 

Tags

NGSS.MS-PS1-1

Which of the following is a subatomic particle with no charge that is found in the nucleus of an atom?

• Electron
• Proton
• Neutron
• Quark

The sum of the protons and neutrons in the nucleus of an atom

• Atomic Number
• Compound
• Electrons
• Mass Number (also called Atomic Mass)

These elements are found along the zig-zag line on the periodic table.

• Metal

• Group

• Metalloid

• Nonmetal

A "group" is a ____________ on the periodic table.

• column (up and down)

• row (right to left)

Elements on the periodic table that are usually shiny, easily hammered into thin sheets or pulled into wires, and are good conductors of electricity are called _____________.

• metals
• nonmetals
• metalloids
• transition elements

Elements on the periodic table that have physical and chemical properties of both metals and nonmetals are called _____________.

• metals
• nonmetals
• metalloids
• transition elements

For a chemical equation to be balanced, reactants and products must have what?

• More atoms in the product than atoms in the reactant
  
• Equal number of compounds
  
• Equal number of molecules
  
• Equal number of atoms of each element
  

Tags

NGSS.MS-PS1-5