<h2>The isotopes of an element all have the same __(atomic, mass) __number, but they have different __(atomic,mass)__numbers.</h2>
Explanation:
The isotopes of an element all have the same __atomic number __, but they have different __mass __numbers.
The isotopes have same atomic number that is :
- Same number of electrons
- Same number of protons
- same electronic configuration
- same valence electrons
- same valency
- same symbol
The isotopes have different mass number that is :
They differ in number of neutrons .
For example : Isotopes of hydrogen are : H₁¹ , H₁² , H₁³
isotopes of Oxygen is : O¹⁶ , O¹⁷, O¹⁸
Answer:
number of valence electrons
Explanation:
The chemical properties of the atoms of elements in a group of the periodic table is most closely related to the number of valence electrons. All the chemical properties can be justified just by the number of valence electrons.
Conversion factor, 1 gallon = 4546.09 ml
Volume of stock solution = 1 gallon or 4546.09 ml
Dose required by the child = 5 ml/day
The number of days a gallon of this medicine last,
4546.09 ml x 1 day/ 5 ml = 909.218 days
Therefore, 1 gallon would last 909 days.
Answer:
Trimethylpentane
Explanation:
(CH3)3CCH2CH(CH3)2 would represent Trimethylpentane!
<span>A balloon filled with helium rises when you
let it go while a balloon filled with carbon dioxide
sinks. This is because the gases inside the balloons have different densities. </span><span>Both gases have different densities where one is lighter than air (Helium) and the other is heavier than air (CO2).</span>
