Answer:
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
Isotopic notation: Protons Neutrons Electrons
¹⁹⁷₇₉Au 79 118 79
Solution:
p+n = atomic mass = 79+118 = 197
e = 79 (atomic number) so the element with atomic number Au.
Isotopic notation: Protons Neutrons Electrons
⁷⁹₃₅Br 35 44 35
Solution:
Number of neutrons = atomic mass - number of protons= 79-35 = 44
Number of protons and electrons are equal so number of electrons are 35.
Isotopic notation: Protons Neutrons Electrons
¹²⁷₅₃I 53 74 53
Solution:
The atomic number of iodine is 53.
Number of neutrons = atomic mass - number of protons= 127-53 = 74
Number of protons and electrons are equal so number of electrons are 53.
Isotopic notation: Protons Neutrons Electrons
⁵⁶₂₆Fe 26 30 26
Solution:
The atomic number of iron is 26.
atomic mass = n+p= 26+30= 56
Number of protons and electrons are equal so number of electrons are 26.
Answer:
It is clear from the above food chain that the grass occupies the first topic level which consists of producers. The second tropic level consist of primary consumers which is Insect. And the Frog assign the Third tropic level of food chain consisting of secondary consumers.Explanation:
The volume of 0.15M NaOH that could be produced with only 5 grams of NaOH and water is 0.83L.
<h3>How to calculate volume?</h3>
The volume of a substance can be calculated using the following expression:
Molarity = number of moles ÷ volume
The number of moles of NaOH can be calculated by dividing the mass of NaOH by its molar mass.
Molar mass of NaOH = 40g/mol
n = 5/40
n = 0.125moles
Volume of NaOH = 0.125mol ÷ 0.15M
Volume = 0.83L
Therefore, the volume of 0.15M NaOH that could be produced with only 5 grams of NaOH and water is 0.83L.
Learn more about volume at: brainly.com/question/905400
The more electrons that are shared between two atoms, the stronger their bond will be. Covalent bonding is an example.
Answer:
44.01 grams
Explanation:
the the mass of 1 mole of CO2 is 44.0 1 grams. there are 6.022×1023 molecules of CO2 in a mole, enough to make the grams in the mole equal the mass.
