STEM Review #3

The correct chemical formula for magnesium phosphide is

• MgP
• Mg₂P₃
• Mg₃P₂
• Mg₃(PO₄)₂

Tags

NGSS.MS-PS1-1

Ba⁺², Br^-1

• BrBa
• Br₂Ba₂
• BaBr₂
• Br₂Ba

Tags

NGSS.MS-PS1-1

When adding a subscript to a polyatomic ion, you should...

• multiply any subscripts on the polyatomic ion by the subscript you are adding
• put parentheses around the polyatomic ion before adding a subscript
• write the new subscript next to any subscripts on the polyatomic ion
• put the polyatomic ion in square brackets before adding the subscript

The formula of calcium phosphate is 

• CaPO₄
• Ca₂(PO₄)₃
• Ca₃PO₄
• Ca₃(PO₄)₂

Tags

NGSS.MS-PS1-1

The chemical formula for tin (IV) oxide is written

• Sn₂O₄
• Ti₂O₄
• SnO₂
• TiO₂

Tags

NGSS.MS-PS1-1

He developed the planetary model of the atom.

• Rutherford
• Bohr
• Chadwick
• Dalton

James Chadwick discovered the ________.

• proton
• neutron
• electron
• nucleus

Tags

NGSS.HS-PS1-8

What did Thomson discover?

• electron
• proton
• neutron
• electron cloud

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus