A. Heat. Positive as the sweat gains heat to evaporate.
B. Work. Negative as the balloon does work to expand.
C. Heat. Positive as heat is transferred to the mixture to warm it up.
Answer:
B
Explanation:
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Answer:
(1) The outermost shell should have Eight electrons to complete or called as octet and attain stability.
(2) Hydrogen and Chlorine share Electrons with each other and form Covalent bonding.
(3) Hydrogen forms an octet by obtaining an electron, and Helium is the only element that has an octet with two electrons.
(4) The octet rule states that an atom should attain eight electrons in the outermost shell to get stability, However we have exceptional like Hydrogen and helium.
(5) In Ionic bond there is a formation of Ions of the elements in a compound, like in NaCl there will be Na+ and Cl-.
(6) While in Covalent bond there is sharing of electron between the atoms included like O2.
(7) In ionic bond there is an electrostatic force of attraction while in Covalent bond the is a mutual sharing of electrons.
Answer:
the popilation of mice will increase, since the fox was their only predator. and the population of snakes will decrease. since the fox was its only food source.
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Answer:
2p
Explanation:
Boron is a member of group 13. The highest energy sub-level is usually found on the outermost shell of the atom of the element involved.
For a group 13 element, its outermost shell configuration is ns2 np1. The electronic configuration for boron is; 1s2 2s2 2p1.
Hence the highest energy sub-level in boron is 2p.