Determine the amount of heat needed to raise the temperature of 276.0 grams of ice at 0.0 °C to water at 50.0 °C.
(water: ∆H vap for water = +43.9 kJ/mol), ΔH fus = +6.02 kJ/mol, s = 4.184 Jg×°C )

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

gold is my favorite solid.

the answers are

c and c