2.3 Atomic Structure and Quantitative Chemistry Flashcards Preview

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Flashcards in 2.3 Atomic Structure and Quantitative Chemistry Deck (15)
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1

The atomic number is the smaller of the two numbers in the periodic table. True or false?

True

2

The mass number is the larger of the two numbers in the periodic table. True or false?

True

3

The mass of a proton

1

4

The charge of a proton

+1

5

The mass of a neutron

1

6

The charge of a neutron

0

7

The mass of an electron

1/1836 or almost 0

8

The charge of an electron

-1

9

The atomic number is equal to

the number of protons in an atom

10

The number of protons in an atom is equal to

the number of electrons in an atom

11

The number of neutrons is equal to

the mass number - the atomic number

12

An isotope of an element has

the same number of protons and electrons but different numbers of neutrons.

13

The relative atomic mass of an atom is the average mass of an atom relative to which element?

Carbon-12

14

Chlorine has a mass of 35.5 which isotope chlorine-35 or chlorine-37 is more abundant?

Chlorine 35. 75% is chlorine 35 and 25% is chlorine 37.

15

The relative molecular mass of a compound is

the sum of the relative atomic masses of the elements in that compound.