Which of the following elements belong to the d-block of the periodic table?

Question 2 options:

transition metals

noble gases

halogens

alkali metals

Difference between protons neutrons and electrons?

New nuclei and neutrons result from: a. nuclear fusion b. the release of electrons from a positively charged atom c. the splitting of an atom s nucleus d. the splitting of an atom s neutron

A sample of compressed methane has a volume of 648 mL at a pressure of 503 kPa. To what pressure would the methane have to be compressed in order to have a volume of 216 mL?

What happens when an acid reacts with an active metal? A neutralization reaction occurs. Hydronium ion concentration is increased. Oxygen gas is produced. Hydrogen gas is produced.

Which is defined as the measure of quantity proportional to the number of atoms

The definition of volume is? a) width*height b) the space occupied by mass c) the space occupied by a liquid d) the mass of liquid required to fill a container

What is the empirical formula of a substance that is 53.5% C, 15.5% H, 31.1% N?

What is the lowest layer of the atmosphere and what is its highest altitude?

An atom that has 84 protons and 86 neutrons undergoes a reaction. At the end of the reaction, it has 82 protons and 84 neutrons. What happened to the atom?

A compound of material formed by a chemical is known as?