Answer:
it is a point at which a liquid Start's to evaporate
Explanation:
the point at which a liquid turns to gass
Answer:
500J (joules)
Explanation:
since heat is is the product of mass, change in temperature, and specific heat, the solution can be found from the equation q = mcΔt, heat is 50 * .5 * 20 = 500J
- Answer:
Energy release is exothermic reaction whiles energy absorb is endothermic reaction
Explanation:
Exothermic reaction is when the reactant is above the product while endothermic the product is below the reactant in the diagrams we have some part as activation energy
Answer:
12 Neutrons
1 Valence Electron
23 ions [11 Protons and 12 Neutrons]
22 ions [11 Electrons and Protons]
Explanation:
To find the number of neutrons in an element, you simply take its atomic number and deduct that from the atomic mass [<em>round</em><em> </em>if necessary]. There is one <em>valence </em><em>electron</em><em> </em>because<em> </em>according to the Periodic Table of Elements, the first three energy levels can fit 2 - 8 electrons:
1st Energy Level → 2 Electrons
2nd Energy Level → 8 Electrons
3rd Energy Level → 8 Electrons
4th Energy Level → 18 Electrons
5th Energy Level → 18 Electrons
6th Energy Level [Lanthanide Series] → 32 Electrons
7th Energy Level [Actinide Series] → 32 Electrons
So, as you can see, 2 + 8 gives you 10. So from there, we already filled up 2 energy levels. Now going to the third one will leave us with only one electron left over. That is where that valence electron is.
** I encourage you to write this down in your Chemistry notebook somewhere, so you can keep this stored in your memory at all times. There are some pointers in the answer as well. Copy that.
I am joyous to assist you anytime.
