Periodic Table

In the modern periodic table, elements are arranged according to increasing ____.

• atomic number

• atomic mass

• date of discovery

• electrical conductivity

The rows of the periodic table are called_____.

• groups

• periods

• spectra

• energy levels

An element that is malleable, ductile, and a good conductor of electricity is most likely a _____.

• metal

• nonmetal

• metalloid

• none of these

The horizontal rows of the Periodic Table are called____.

• groups

• periods

• spectra

• energy levels

1. Which term describes the substance that forms when two or more types of atoms join?

• element

• compound

• composite

• mixture

Tags

NGSS.MS-PS1-1

When substances combine to form a mixture, they

•  keep their original properties.

•   form new chemical bonds.

• form a new compound.

• cannot be separated physically.

1. Which of these determines the identity of an element?

   

•  number of electrons

• number of protons

• number of energy levels

• number of neutrons

1.  Which of these is not made up of two or more substances that are combined physically?

• homogeneous mixture

• compound

• heterogeneous mixture

• solution

Sodium is an element found in table salt. It contains 11 protons and 12 neutrons. How many electrons are found in a neutral atom of sodium?

• 23

• 11

• 12

• 1

Tags

NGSS.MS-PS1-1

Elements in the same column of the periodic table have:

• similar chemical properties

• the same number of protons

• similar atomic masses

• atoms of same size