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ATOMIC STRUCTURE
ABOUT THE PERIODIC TABLE
FAMILIES OF ELEMENTS
USING THE PERIODIC TABLE
VOCABULARY
100

definition of an atom

the smallest possible bit of an element that still retains the properties of that element
100

An element's atomic number represents this

What is the number of PROTONS

100

In the periodic table, elements are put into these two main groups

What are metals and nonmetals

100

how many known elements are there in total

118

100

When an atom loses or gains electrons, it becomes this

What is an ION

200

Most of an atom is this

What is empty space

200

Horizontal rows (<---->) on the periodic table are called this

What are periods

200

The most reactive group of metals are these.

What are the alkali metals (Group 1)

200

The first element is this (atomic number 1)

hydrogen

200

When the number of neutrons is not the same as the number of protons, you have this

What is an ISOTOPE

300

The three main subatomic particles that atoms are made of

What are protons, neutrons, and electrons

300

Vertical (up-and-down) columns on the periodic table are called this

What are groups (or families)

300

Non-metallic elements, such as arsenic, that have some properties of metals are known as ___________

What are semi-conductors

300

Name a noble gas

(Any one:) helium, neon. argon, kryptin, xenon, radon, ununoctium

300

an ion with a positive charge is called this

What is a cation

400

The reason why atoms have no charge

What is because the have the same number of electrons (negatively charged) and protons (positively charged) so the negative and positive cancel each other out

400

Elements in the same GROUP have the same number of these

What are valance electrons

400

The noble gases are found in this group

What is group 18

400

where transitional metals are found on the periodic table

in the middle

400

an ion with a negative charge is called this

What is an anion

500

How you figure the amu (mass) of an atom

number of protons + number of neutrons

500

Elements in the same PERIOD have the same number of these

What are electron shells (rings/orbitals/electron clouds)

500

All elements with an atomic number greater than _____ are man-made; they do not occur naturally

What is 92

500

Ruthenium's amu

101.07

500

The electrons on the outermost (last) electron shell are called ___________ electrons

What is valance