Ch Periodic Table Test

Match the scientist with their contribution to the periodic table.

• Antoine Lavoisier

• Known as the "father of the periodic table" who organized 63 elements by increasing atomic weight.

• William Ramsay

• Developed a systematic chemical naming system for the early known 33 elements and classified them as metals or nonmetals.

• Henry Moseley

• Determined that the defining characteristics of elements was based on the atomic number and gave us the modern periodic table by rearranging the elements.

• Dmitri Mendeleev

• Discovered a new group of elements known as Noble Gases.

Elements in a Group have the same number of ​ (a)   and similar ​ (b)  

• valence electrons
• reactivity
• neutrons
• ionization
• protons
• atomic radius

Which group is the most reactive group of NONMETALS on the Periodic Table? (Click on the correct group/ family)

Tags

NGSS.MS-PS1-1

A student is asked to identify an element that is a pale-yellow, brittle solid, and does not conduct electricity.

At which location in this periodic table would the element most likely be found?

Tags

112.20.b.5.C

Organize these options into the right categories

Groups:

(a) Metal

,

(b) Non-Metal

,

(c) Metalloid

• Dull

• Conductive

• Luster

• Properties of Both

• Semi-Conductor

• Malleable

• Low Density

• Brittle

• Dense

• Insulator

Most elements are (a)   ,​ (b)   , and not commonly found in an​ (c)   state.

• metals
• reactive
• uncombined
• non-metals
• non-reactive
• combined

The order of elements in the periodic table is based on

• the number of protons in the nucleus.

• the electric charge of the nucleus.

• the number of neutrons in the nucleus.

• atomic mass.

Match the term with it's definition...

• Diatomic Molecules

• Elements that are not found as single atoms but instead naturally exist in pairs.

• Semi-conductors

• When two or more elements are combined, one being a metal, that results in a substance with properties different from the original elements.

• Allotropes

• Elements that conduct electricity under certain conditions and are useful in the technology industry.

• Elemental State

• Different structural forms of the same element in the same physical state with varying physical and chemical properties due to different arrangements of atoms or different numbers of atoms in a molecule.

• Alloy

• The physical states of matter that elements can exist in, most commonly solid, liquid, and gas at 25 degrees Celsius and 1 atmosphere of pressure.

Tags

NGSS.MS-PS1-1

Carbon and other nonmetals are found in which area of the periodic table?

• on the left-most side

• on the right side

• in the middle column of the periodic table

• in the bottom rows

As you move from left to right across the periodic table, elements

• become less metallic.

• have a lower atomic number.

• have a lower atomic weight.

• become more metallic.