elements
Atoms
Periodic Table
Chemical Reactions
100

How many elements are there on the Periodic Table?

118

100

What subatomic particle has a positive charge?

Proton! 

100

How is the periodic table arranged?

left to right and top to bottom in order of increasing atomic number.

100

What do you call a substance that speeds up a chemical reaction without being used up in the reaction?

A catalyst is a substance that speeds up a chemical reaction

200

What is synthetic element? 

A synthetic element is one of 24 known chemical elements that do not occur naturally on Earth: they have been created by human manipulation of fundamental particles ina nuclear reactor

200

How many electrons are in a neutral atom of Oxygen?

8 electrons! 

200

What do the rows on the periodic table represent?

The rows on the periodic table are called periods. All the elements in a period have valence electrons in the same shel

200

What is the chemical symbol for water?

H20 

300

What is the smallest unit of an element that still retains the properties of that element?

Atom! 

300

 What is the central part of an atom called, containing protons and neutrons?

THE NUCLEUS! 

300
  • Elements in the same __ have similar chemical properties.

SAME GROUP! 

300

Sodium hydrogen carbonate's NaHCO3 common name is? 

How many elements are in this compound? 

Baking soda

400

Name an element that is alkali metals, what what is one characteristic about alkali metal? 

Any elements in group 1 except H, and they are highly reactive to water. 
400
  • True or False: The number of protons in an atom is equal to its atomic number.

TRUE! 

400

what are elements used to spell science using periodic table

Sc ( Scandium), Iodine ( I), e- ( electron), N (nitrogen)  & Cerium ( Ce) 

400

When iron rusts, is this an example of a chemical or physical reaction?

Chemical Change! 

500

 What is the most abundant element in the Earth's atmosphere?

NITROGEN! (78.084%) 

nitrogen dilutes oxygen and prevents rapid burning at the Earth's surface. Living things need it to make proteins.

500

What do you call atoms of the same element with different numbers of neutrons?

Isotopes: SAME ELEMENT WITH DIFFERENT numbers of NEUTRONS 



500
  • What group on the periodic table contains elements known as the "noble gases", and what is the common characteristic of noble gases?

GROUP 18 


odorless, colorless, nonflammable, and monotonic gases that have low chemical reactivity

500
  • What is the difference between a chemical process and a physical process in chemistry?

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed 

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