First Twenty Elements

A one or two letter abbreviation  used to represent an element is called a(n) ________

• chemical symbol

• element sign

One physical characteristic of metals is...

• Luster (shine)

• Weight

• All are gases. 

Tags

NGSS.MS-PS1-1

An example of elements from period 3 that have the same number of electron shell

• Hydrogen and Oxygen

• Sodium and Potassium

•  Sodium and Magnesium

• Helium and Hydrogen

Groups contain the same amount of ___________________ electrons, and periods contain the same number of ____________________shell.

•  atom/ electron

• valence/electron

• electron /valence

• protons/neutrons  

What is the chemical symbol for Aluminum?

• A

• Al

• Au

What do the blue and red spheres represent in this model of an atomic nucleus?

• Gluons and leptons

• Protons and neutrons

• Positrons and electrons

• Atoms and molecules

Tags

NGSS.HS-PS1-8

What do the elements highlighted orange have in common?

• The same number of protons

• The same number of electrons

• The same number of neutrons

• The same number of electrons shells

Elements in the same________ often have similar chemical and physical properties.

• period

• group

In which region would the nonmentals be found?

• 1

• 4

• 3

• 5

The blue elements are called 

• metals

• nonmetals

• metalloids

• noble gases

Tags

NGSS.MS-PS1-1