introduction to elements ch2 Flashcards

1
Q

the basic structural unit of an element is ________which is the smallest unit of an element

A

the atom

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2
Q

______is element too small to be seen the naked eye

A

copper

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3
Q

how many element :

A

118

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4
Q

nucleus is

A

small dense positively charged region in the center of the atom

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5
Q

determine the identity of the atom :

A

proton

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6
Q

why is the atom neutral ?

A

because the charges are balanced and effectively cancel one another

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7
Q

isotopes

A

are atoms of the same element having different masses because they have different number of neutrons

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8
Q
A
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