8th Grade Science Periodic Table Test

Nitrogen

I am the only gas in column 15

Osmium

I have 114 neutrons

Lead

I have 125 neutrons

Niobium

I have 41 protons

Samarium

I have 62 protons

Holmium

I have 67 protons

Lutetium

I have 71 electrons

Gold

I have 79 electrons

Berkelium

I have 97 electrons

Tin

I'm Dorothy's friend who needed a heart

Selenium

I'm a nonmetal who is solid at room temperature and has 2 letters for my symbol

Copper

I'm in group 11 and period 4

Astatine

I'm in group 17 and the only metalloid

Iodine

I'm in the 17th column, a nonmetal, & a solid a room temperature

Neon

I'm in the 18th group and 2nd period

Francium

I'm in the 1st group and 7th period

Radon

I'm the only gas in period 6

Boron

I'm the only metalloid in group 13

Carbon

I'm the only nonmetal in period 2

How to find reactivity on the Periodic Table:

Increasing reactivity going down the table; increasing activity from right to left

Fermium

My atomic mass is 257

Strontium

My atomic number is 87.62

Hassium

My chemical symbol is Hs

Neptunium

My name comes from the 8th planet

Curium

My name fits really well with doctors because they try to do this

Plutonium

My name is similar to Mickey Mouse's best friend

Americum

My name reminds me of where we all live

Meitnerium

My symbol is Mt

Palladium

My symbol is Pd

Neutral (happy) atom

an atom that has 8 valence electrons

Ductile

can be drawn into a wire

Malleable

can be rolled or hammered into a shape

Physical Property

characteristics you can observe and describe about matter without changing it chemically

Group/Family

columns 1-18; organized by the number of valence electrons; elements in the same family share similar chemical properties; families on the left are more reactive; families on the right are most stable

Metal

has luster; is malleable; good conductor of heat and electricity; is ductile; ¾ of the periodic table

Metalloid

has similar properties to metals; semi-conductors- can conduct electricity under the right circumstances; used in digital technology

Conductor

heat and electricity can flow through

Luster

how an element reacts to light; shiny

Atomic Number

number of protons

Atomic Mass

number of protons and neutrons; the average of all the isotopes of the element

Nonmetal

opposite properties of metals; variety of colors; poor conductors of heat and electricity; brittle

Group

organized by column on the periodic table; there are 18; have the same number of valence electrons; also called families; share similar chemical properties

Period

organized by row on the periodic table; there are 7; have the same number of electron energy levels (orbitals)

Element

pure substance; composed of atoms containing the same number of protons

Period

rows 1-7; organized by atomic number and electron energy levels

Valence Electron

the electrons on the outermost energy level; high energy; enable atoms to chemically bond with other atoms

Valence Electrons

they determine an element's stability/reactivity; they allow atoms of elements to bond with other atoms.

Energy Level (orbital)

where the electrons are located around the nucleus; lower energy levels are located closer to the nucleus, and higher energy levels are farther away; each energy level can only hold a certain number of electrons