Bio Ch 2.1 Practice Review
For a neutral (uncharged) element, the number of electrons is equal to the -----?
Number of protons
How many protons are in an atom Sr-86?
How many neutrons are in an atom of Sr-86?
86-38 = 48
How many electrons are in an (uncharged) atom of Sr-86?
How many protons does Iron have?
What is Iron's mass number?
What is Iron's atomic mass?
How many electrons does Iron have?
How many neutrons does Fe-56 have?
56-26 = 30
Fe +1 means
Iron lost an electron
Fe -2 means
Iron gained two electrons
If Fe gains electrons it is called a(n)
H2O is held together by _________ bonds
NaCl is held together by ________ bonds
Which bond (ionic/covalent) is stronger?
Where are protons located?
Where are electrons located?
electron cloud outside the nucleus
What charge does a neutron have?
What charge does a proton have?
What subatomic particle determines the element
How many electrons does an element want to have in the outer level
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