Properties of Water

The positive ions have _____________ electrons.

• lost

• gained

Tags

NGSS.HS-PS1-1

The negative ions have _____________ electrons.

• lost

• gained

Tags

NGSS.HS-PS1-2

Why do elements bond?

• To be friends
• To create a new element
• To become stable

What part of the atom does bonding involve?

• protons

• neutrons

• all electrons

• valence electrons

Tags

NGSS.HS-PS1-4

An electron has what kind of charge?

• no charge
• positive 
• negative
• it depends

Tags

NGSS.HS-PS2-4

An atom with 1 valence electron 'needs' a full shell, so it can either gain 7 electrons or lose 1. Which is more likely to occur?

• nothing

• gain 7

• lose 1

Tags

NGSS.HS-PS1-1

When ions GAIN electrons, they become _____ charged.

• postively

• negatively

• same

Tags

NGSS.HS-PS1-2

What is an example of an ionic compound?

• Water (H2O)

• Carbon dioxide (CO2)

• Sodium chloride (NaCl)

• Methane (CH4)

Answer explanation

Sodium chloride (NaCl) is an example of an ionic compound due to the attraction between positively charged sodium ions and negatively charged chloride ions.

How many valence electrons are most elements trying to have to become more stable?

• 5

• 6

• 7

• 8

Tags

NGSS.HS-PS1-1

In a model of the water molecule - what do the ears of the shape Mickey Mouse represent? What is the charge of this particle of the water molecule? Choose two.

• Hydrogen atoms

• Oxygen atoms

• negative charge

• positive charge

Tags

NGSS.HS-PS1-3