How many protons does zinc have in its atom?
a. 65
b. 35
C. 30
d. 95

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

Name the element in group 17, period 2. (periodic table)

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space