atomic strcture Flashcards

1
Q

STATE WHY ATOMS HAVE NO OVERALL CHARGE

A

because number of postive protons is equal to negative electrons

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2
Q

state why both isotopes react in the same way

A

because they have same electronic configuration

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3
Q

relative mass of proton and neutron

A

1,1

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4
Q

rule of relative atomic mass

A

r1ar1+r1ar2/sum of ratiosnnj

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5
Q

give reason why x has a 3+ charge

A

has lost 3 electrons

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6
Q

explain why y and z are isotopes of the same element

A

bec has same number of electrons but different phisical prporties

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7
Q

state meaning of atomic number

A

it is the number of protons inside nucleus

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8
Q

give a reason why both isotopes of bromine have the same chemical proprties

A

because have same electronic congiguration

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9
Q

which of this have the smallest mass electron,neutron,nucleus,proton

A

electron

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10
Q

what is relative mass of electron,proton,neutron

A

1/8000,0.005,1,1

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11
Q

give the symbol of the element that has a relative atomic mass of 14

A

n

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12
Q

identfy the group whose atoms form ions with a charge of -1

A

7

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13
Q

what would be seen if a sample of the element containing only atoms with a mass number of 26 was added to dilute sulphric acid?explain

A

observation:effervense
explain:they have sME ELECTRONIC CONFIGURATION

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14
Q

What is meant by atom

A

Smallest particle of element that can take in chemical reaction and show all properties that element

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15
Q

Why atom is neutral?

A

Because number of protons equal number of electrons

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