A pH of 7 or lower makes something an acid so it would be 3
Answer:
1 200 000 000 000 000 000 000 000 H⁺ ions
Step-by-step explanation:
Assume that the concentration of H⁺ ions in stomach ions is <em>2.0 mol·L⁻¹.</em>
Then, we have 2.0 mol of H⁺ ions
There are 6.02 × 10²³ H⁺ ions in 1 mol.
2.0 mol = 2.0 × 6.022 × 10²³/1
= 1.2 × 10²⁴ H⁺ ions
= 1 200 000 000 000 000 000 000 000 H⁺ ions
Explanation :
Isotope : It is defined as the element that have the same number of protons but have the different number of neutrons of each of the atom.
Atomic number is defined as the number of protons or number of electrons.
Atomic number = number of protons = number of electrons
Mass number is defined as the sum of number of protons and number of neutrons.
Number of neutrons = Mass number - Number of protons
For the given options:
(a)
Atomic number = 5
Number of proton = 5
Number of electron = 5
Atomic mass = 10
Number of neutrons = Atomic number - Number of protons
Number of neutrons = 10 - 5 = 5
(b)
Atomic number = 80
Number of proton = 80
Number of electron = 80
Atomic mass = 199
Number of neutrons = Atomic number - Number of protons
Number of neutrons = 199 - 80 = 119
(c)
Atomic number = 29
Number of proton = 29
Number of electron = 29
Atomic mass = 63
Number of neutrons = Atomic number - Number of protons
Number of neutrons = 63 - 29 = 34
(d)
Atomic number = 6
Number of proton = 6
Number of electron = 6
Atomic mass = 13
Number of neutrons = Atomic number - Number of protons
Number of neutrons = 13 - 6 = 7
(e)
Atomic number = 34
Number of proton = 34
Number of electron = 34
Atomic mass = 77
Number of neutrons = Atomic number - Number of protons
Number of neutrons = 77 - 34 = 43
Answer:
They form crystals, they have really high boiling points, They have higher enthalpies of fusion and vaporize than an molecular compound, the are brittle
Explanation:
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The mass number of an atom is obtained by totalling up the number of protons and neutrons there are for that atom.