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Definition
Definition
Definition
Definition & NJASK Practice
NJASK Practice
100
The characteristics of a substance that describe what will happen when it interacts with other substances.
What is chemical properties
100
Evidence that a chemical reaction is occurring.
What is indication
100
A chemical substance that is made up of two or more different kinds of atoms that are bonded together
What is compound
100
A positively charged particle in an atoms nucleus
What is protons
100
Which element is least likely to combine with another element to form a molecule?
What is Silicon (Si), a metalliod
200
A reaction between substances that results in new substances with different chemical properties being formed.
What is chemical change
200
A type of chemical change that releases heat energy to the surrounding
What is exothermic
200
Smallest part of a substance that is made up of two or more atoms
What is molecule
200
Any elements on the left side of the periodic table except for hydrogen; are typically good conductors
What is metals
200
A certain molecule has a ratio of one atom of element X for every two atoms of element Y. Suppose a sample of element X and a sample of element Y react to form exactly 1 kg of XY2, with no reactants left over. Which could be the amounts of X and Y in the reaction?
What is 300 g of X and 600 g of Y
300
The process in which the physical and chemical properties of substances are changed into different substances that have their own physical and chemical properties
What is chemical reactions
300
The physical law stating that matter cannot be created or destroyed in chemical reactions.
What is conservation of matter
300
Letters and numbers that tell the types and numbers of atoms in a single molecule
What is chemical formula
300
An element that lacks the characteristics of a metal; the element on the ride side of the periodic table
What is nonmetals
300
Which is an example of a chemical change?
What is An iron bridge turning brownish-red over the years
400
One of the original substances in a chemical reaction
What is reactants
400
A substance that cannot be broken down by simple chemical and physical processes
What is element
400
A visual representation of all elements arranged in increasing atomic number and grouped according to similar properties
What is periodic table
400
Which correctly compares the elements on the right side of the elements on the left side of the periodic table?
What is The elements on the left side are better conductors of electricity than the elements on the right side.
400
Which equipment will best separate a mixture of sand and sugar?
What is filter paper,water, and beakers
500
One of the substances formed from a chemical reaction
What is products
500
Smallest particle of an element; building block of matter
What is atom
500
The number of protons in an atoms nucleus
What is atomic number
500
Which is a property of fluoride (F), a nonmetal?
What is It is a gas at room temperature and pressure
500
Five molecules of methane contain five carbon atoms and 20 hydrogen atoms. What is the chemical formula of methane?
What is C5H20