The colour imparted to a flame by calcium ion?

What type of radioactive decay involves two protons and two neutrons? alpha emission beta emission positron emission gamma rays

Which of the statements below concerning chemical bonds is true? which of the statements below concerning chemical bonds is true? a covalent bond occurs when one or more electrons are transferred from a metal atom to a nonmetal atom.

Barium and lead both produce yellow precipitate with the chromate ion as part of their confirmation tests. if you had a sample that possibly contained lead, barium, or both ions, outline a procedure for correctly identifying the cations present.

Which statement best describes the shape and volume of an aluminum cylinder at STP? (1) It has a definite shape and a definite volume. (2) It has a definite shape and no definite volume. (3) It has no definite shape and a definite volume.

Under extreme heat and pressure, sandstone will transform into quartzite. What type of rock is quartzite

Which of the following should be done when designing an experiment for a controlled scientific investigation? A. list the procedures B. plan the variables C. list the needed materials D. all of these

Assuming the octet rule is obeyed, how many bonds and how many lone pairs will atoms of oxygen (o) and nitrogen (n) have in order to have formal charges of + 1?

Explain why animals must eat food, but plants do not have to.

What is the theoretical yield of moles of hydrogen that can be produced from 0.032g of MG?

What did JJ Thomson think the Atom looked like?