Atoms
Elements
Metals
Metalloids/ Nonmetals
History of the Atomic Structure
100
The smallest particle of an element is called a(n)
atom
100

Known as the "Father" of the periodic table

Demetri Mendeleev

100
The ease and speed with which elements combine and react with other elements and compounds is called what?
reactivity
100

In a neutral atom, the number of protons equals the number of what?

electrons

100

First person to propose the name "Atom" but did not use evidence to back his thoughts. 

Democritus

200
The negatively charged particles of an atom that surround the nucleus are called
electrons
200
What can be predicted from an element's location on the Periodic Table?
its properties
200
The property of metal that allows it to be drawn out into wire is
ductility
200

The group of elements that has characteristics of both metals and nonmetals is

metalloids / semi-conductors

200

First individual to use research to back his theory of the atom being an indestructible ball. 

John Dalton

300
The positively charged particles in the nucleus of an atom are called
protons
300
Horizontal rows on the periodic table are called
periods
300
The property of metal that allows it to transfer heat or electricity to another object is called
conductivity
300

This group of non-metals forms group 17 (7) on the Periodic Table

Halogens

300

JJ Thompson's model was nicknamed the...

Plum-Pudding Model

400
The number of protons in the nucleus of an atom is called the atom's
atomic number
400
The 18 vertical columns on the Periodic Table are called
groups
400

This is the most reactive group of metals

Alkali Metals

400

This group consists of nonmetals that are the least reactive elements on the Periodic Table

Noble Gasses

400

What important part of the atom was discovered by Rutherford's Gold Foil Experiment?

Nucleus

500
The sum of the protons and neutrons in the nucleus of an atom is called its
mass number
500
One or two letters that are an abbreviation of an element's name.
chemical symbol
500

Alkaline Earth Metals tend to form what type of ion with what charge?

Cation, +2

500

This specific term refers to non-metals properties of breaking very easily.

Brittle

500

The quantum model states electrons have a "dual" nature behaving like both particles and ......

waves

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