When zinc is exposed to air, zinc oxide is produced. What type of reaction is this reaction? 2 Zn + O2 →
2 Zno

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand

How many neutrons does an element have if its atomic number is 50 and its mass number is 166

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.