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Chemistry SED > Topic 1 States Of Matter > Flashcards

Topic 1 States Of Matter Flashcards

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1
Q

What are the three states of matter?

A

Solid, liquid, gas

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2
Q

Define matter.

A

Anything that has mass and occupies space.

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3
Q

How can matter be classified?

A
  • According to its physical state: gas, liquid, solid.
  • According to its composition: elements, compound, mixture.
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4
Q

What is an element?

A

A substance made up of atoms with the same atomic number.

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5
Q

What is a compound?

A

Two or more different elements bonded together.

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6
Q

What is an atom?

A

The smallest individual building block of the elements.

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7
Q

What does the atomic number represent?

A

The number of protons in an atom.

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8
Q

What is the mass number?

A

The number of protons plus the number of neutrons.

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9
Q

What are isotopes?

A

Atoms with the same number of protons but different numbers of neutrons.

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10
Q

What is a molecule?

A

A neutral entity consisting of two or more atoms held together by chemical bonds.

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11
Q

True or False: All compounds are molecules, but not all molecules are compounds.

A

True

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12
Q

What are ions?

A

Electrically charged particles formed when compounds break up in solution.

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13
Q

Fill in the blank: The formula for water is _______.

A

H2O

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14
Q

What is the chemical formula of sulfuric acid?

A

H2SO4

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15
Q

What is the significance of valence electrons in chemical bonding?

A

They are the electrons that participate in bonding between atoms.

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16
Q

What is the formula for sodium chloride?

A

NaCl

17
Q

Name two types of chemistry.

A
  • Inorganic
  • Organic
18
Q

What is the chemical formula for ammonia?

A

NH3

19
Q

Fill in the blank: The formula for calcium hydroxide is _______.

A

Ca(OH)2

20
Q

What is the formula for nitric acid?

A

HNO3

21
Q

What is the difference between a compound and a molecule?

A

A compound consists of different elements, while a molecule can consist of the same element.

22
Q

What is the primary role of chemical bonds?

A

To lower the potential energy between charged particles.

23
Q

What are the names of the first thirty elements in the periodic table?

A

[Refer to periodic table for names and symbols]

24
Q

What is the formula for potassium hydroxide?

A

KOH

25
Q

What do brackets in chemical formulas indicate?

A

They indicate the number of atoms inside the brackets.

26
Q

What is the formula for chlorine gas?

A

Cl2

27
Q

Define ‘Chemical Kinetics’.

A

The study of the rates of chemical processes.

Chemistry SED (5 decks)

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