In atomic emissions spectroscopy, the atom (s) absorb energy, become excited, and release energy in what form?

31. Which of these statements is FALSE? a. Protons have a positive charge. b. Electrons are negatively charged and have a mass of 1 amu. c. The nucleus of an atom is positively charged. d. The neutron is found in the nucleus of an atom.

What is the maximum number of unpaired electrons in a d subshell?

The most massive star known in the universe is thought to be R136a1, which may be as much as 256 times the mass of our sun. What do R136a1 and our sun have in common? A) They have the same amount of helium. B) They have the same amount of hydrogen.

a sample of an oxide of iron was reduced to iron by heating with hydrogen. the mass of iron obtained was 4.35g and mass of water is 1.86g. deduce the equation for the reaction occurred.

Among pattasium and calcium which is more reactive, why

The plant food contains nh4) 3po4 what tests would you run to verify the presence of the nh4 ion and the po4 ion

How many atoms of each element does potassium nitrate, KNO3, contain? A. Potassium = 3 atom, Nitrogen = 3 atom, Oxygen = 3 atoms B. Potassium = 3 atom, Nitrogen = 1 atom, Oxygen = 3 atoms C. Potassium = 1 atom, Nitrogen = 3 atom, Oxygen = 3 atoms D.

Which of the following statements is true? Question 1 options: Metals lose electrons to become cations. Nonmetals gain electrons to become cations. Nonmetals lose electrons to become cations. Metals gain electrons to become cations.

Which is a characteristic of aromatic hydrocarbons? A. They have triple bonds B. They are cyclic C. They are saturated D. They are in straight lines.

The large number before a molecule is called a