Polarity

____ changes between positive and negative polarity (changes direction current flows). 

• AC

• DC

If using DC+ when welding the electrode will be connected to the _______ terminal and your workpiece to the ________. 

• negative, positive

• positive, negative

Electrons flow from the ______ terminal to the ________ terminal in an electric circuit. 

• positive, negative

• negative positive

This is an example of a __________ bond.

• non-polar covalent

• polar covalent

• ionic

• metallic

Tags

NGSS.HS-PS1-1

Partial charges like the ones shown here are called:

• dipoles

• deltas

• ions

• magnetic poles

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

In a polar covalent bond, electrons are shared ___________.

• equally

• unequally

• between non-metals with similar electronegativities

• between a metal and a non-metal

In this Lewis structure, the symbol above F means...

• electrons are being transferred to Fluorine

• electrons are less attracted to F than H

• electrons are more attracted to F than H

• Fluorine has formed a cation

Tags

NGSS.HS-PS1-2

Which molecule contains bonds of GREATER polarity?

• H₂O

• OF₂

Which molecule contains bonds with a GREATER polarity?

• HCl

• CCl₄

A diatomic molecule like O₂ is always_______ because electrons are shared ________.

• nonpolar; equally

• polar; equally

• nonpolar; unequally

• nonpolar; unequally