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
2
Q
______is element too small to be seen the naked eye
A
copper
3
Q
how many element :
A
118
4
Q
nucleus is
A
small dense positively charged region in the center of the atom
5
Q
determine the identity of the atom :
A
proton
6
Q
why is the atom neutral ?
A
because the charges are balanced and effectively cancel one another
7
Q
isotopes
A
are atoms of the same element having different masses because they have different number of neutrons
8
Q
A
