What element has an atomic number of 20 and two valence electrons in its valence shell?

Which of the following best describes why a cruises ship floats? A) it describes why a cruise ship floats. B) its volume and mass are equal C) its displaces an equal or greater amount of water then its own weight.

What volume of 2.5M NaOH solution contains 3.25 mol of NaOH? Immersive Reader

Which of the following characteristic must be present for a substance to be called a mineral

A mixture of two gases has a total pressure of 5.7 atm. If one gas has a partial pressure of 4.1 atm, what if the partial pressure of the other gas?

Calculate the volume of dry co2 produced at body temperature (37 ∘c) and 0.960 atm when 24.0 g of glucose is consumed in this reaction.

What is organic chemistry?

What is the total number of electrons shared in a double covalent bond between two atoms? (1) 1 (3) 8 (2) 2 (4) 4

Which method separates mixtures according to the rates their components travel through a material? yhaoo answers?

How many protons are in the nucleus of the isotope in-115?

Explain why gas is condensed when they're cooled