The symbol : 
<h3>Further explanation
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There are two components that accompany an element, the mass number and atomic number
Atoms are composed of 3 types of basic particles (subatomic particles): <em>protons, electrons, and neutrons
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The Atomic Number (Z) indicates the number of protons and electrons in an atom of an element.
Atomic number = number of protons = number of electrons ⇒ neutral number
Atomic mass is the sum of protons and neutrons
Atomic Number (Z) = Atomic mass (A) - Number of Neutrons
The element has 71 electrons and a charge of +1 , so
Number of protons = 71 + 1 = 72
Number of protons = the atomic number = 72
The element with atomic number 72 is Hafnium(Hf)
The atomic mass of Hf = 178 g/mol
Answer:
The water potential of a solution of 0.15 M sucrose solution is -3.406 bar.
Explanation:
Water potential = Pressure potential + solute potential
We have :
C = 0.15 M, T = 273.15 K
i = 1
The water potential of a solution of 0.15 m sucrose= 
(At standard temperature)
The water potential of a solution of 0.15 M sucrose solution is -3.406 bar.
Carbon (from Latin: carbo "coal") is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent-making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust.
Rules:
1) The oxidation number of a monatomic ion equals the charge of the ion.
2)The oxidation number of a Group 1 element in a compound is +1.
3) The oxidation number of a Group 17 element in a binary compound is -1.
4) The sum of the oxidation numbers of all the atoms in a neutral compound is 0.
KCl is an ionic compound. Consists of K+ ions and Cl- ions.
Oxidation of K= +1 (rules 1 and 2)
Oxidation of Cl= -1 (rules 1 and 3)
Rule 4 also applies- +1 + (-1)= 0- a neutral compound
Hope this helps :)
Explanation:
