<u>Answer:</u> Both the given species are isotopes of the same element.
<u>Explanation:</u>
An isotope is defined as the chemical species that have the same atomic number but a different mass number.
The atom consists of 3 subatomic particles:
- Protons: They are positively charged particles present in the nucleus of an atom.
- Electrons: They are negatively charged particles present in the orbits around the nucleus of an atom.
- Neutrons: They are neutral particles present in the nucleus of an atom.
An atomic number is defined as the number of protons or number of electrons present in a neutral atom. It remains specific for a particular element.
Mass number is defined as the sum of the number of protons and neutrons present in the nucleus of an atom.
Given values:
<u>For isotope 1:</u>
Number of protons = 11 = atomic number
Number of neutrons = 13
Mass number = 11 + 13 = 24
<u>For isotope 2:</u>
Number of protons = 11 = atomic number
Number of neutrons = 12
Mass number = 11 + 12 = 23
As the atomic number of both the isotopes is the same. Thus, they belong to the same elements.
Answer:
Steps of a scientific investigation include:
1. Identifying a research question or problem
2. Forming a hypothesis
3. Gathering evidence
4. Analyzing evidence
5. Deciding whether the evidence supports the hypothesis
6. Drawing conclusions
7. Communicating the results.
Moles HCl reacted : 0.0135
<h3>Further explanation</h3>
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
Where
M = Molarity
n = Number of moles of solute
V = Volume of solution
So to find the number of moles can be expressed as
n = V x M
The volume of HCl 30 cm³=3.10⁻² dm³
Molarity of HCl = 0.45 mol/dm³
so moles HCl reacted :
Answer:
B) conducts electricity
Explanation:
Metals are conductors, literally meaning they conduct electricity.
One metal is liquid at room temp (there might be one more but I only know of mercury).
The reactivity depends on the placement in the periodic table.
If it conducts electricity, it can't be an insulator.
Answer:
The four elements most commonly found in living things are carbon, nitrogen, hydrogen, and oxygen.
Explanation:
The four elements most commonly found in living things are carbon, nitrogen, hydrogen, and oxygen.
