Basic concepts of Matter Flashcards
The smallest particle that can be obtained by subdividing a compound while retaining the properties of the compound is a_______?
Molecule
A compound is a pure substance made up of_____or more different kinds of elements.
2
The properties of table salt are______than the elements sodium and chlorine from which it is made.
Different
When a compound is broken down by chemical methods, it_______into a different substance.
Changes
A pure substance which cannot be broken down into simpler substances by chemical or physical means.
Element
Analysis of a pure substance shows that it contains two elements
Compound
A pure substance decomposes upon heating to give two new substances.
Compound
A pure substance is known to contain only one kind of atom.
Element
Both elements and compounds are pure substances. True or false?
True
A compound results from physical combination of two or more elements. True or false?
False
Compounds can be broken down into their elements by chemical means. True or false?
True
Does each element have its own unique name?
Yes
Each element has a_____and a. Chemical____.
Name, symbol
Is the first letter of a chemical symbol always or never? Capitalized? Is the second letter of a chemical symbol always or never capitalized?
Always, never
What are the chemical symbols of the following elements: Copper, Silver, Fluorine?
Cu, Ag, F
Water contains ____ as much hydrogen as oxygen?
Twice
When water is broken down to its elements of hydrogen and oxygen, there will be____as much oxygen gas as hydrogen gas.
Half
The chemical formula for aspirin is c9 h8 04. In a molecule of aspirin, how many atoms of each element are there?
Carbon: 9, Hydrogen: 8, Oxygen: 4
True or false, capitalization is very important in formulas?
True
Mg(NO3)2
How many nitrogen atoms and how many oxygen atoms are present in the above formula?
2 nitrogen, 6 oxygen
Al2(SO4)3
How many atoms of each element in the above formula are present? Aluminum, sulfur, oxygen?
2, 3, 12
When an element occurs as a molecule, it is still an______?
Element
If a molecule only has one element, it is a(n)______?
Element
What is chemistry?
The field of study concerned with the characteristics, composition, and transformations of matter
What is matter
Anything that has mass and occupies space
Nearly all changes that matter undergoes involve the release or absorption of_____?
Energy