When heating lithium carbonate (Li2CO3), it will dissociate to Li2O and Co2. So the balanced chemical equation of this reaction is Li2CO3 = Li2O + CO2.
I agree with you I doubt that helium is highly flammable.
As we know Sodium belongs to Group I metals and it has a tendency too lose one electron and obtain noble gas configuration (Stable Configuration). On the other hand chlorine belongs to Group VII elements (Halogens) and it tends to gain one electron and attain noble gas configuration.
So, sodium attains +1 charge and chlorine attains -1 charge. In order to form a neutral compound, exactly one +ve and one -ve charges are required. Therefore, one sodium and one chlorine ratio is present in NaCl.
ANSWER: NaCl
Answer: It has more neutrons. Its mass number is larger than the atomic mass number for carbon.
Explanation:
We can see that all the isotopes of Carbon occupies the same slot in the periodic table and thus the same periodic number.
Atomic number of carbon = 6
Periodic Table gives us the information of Atomic number and mass number of atoms of an element.
Atomic number does not give any information about the number of neutrons of an atom. Atomic number of an element is the number of protons in the nucleus of each atom of that element.
Mass number is defined as the total number of protons and neutrons in an atom. Mass number of a typical carbon atom is equal to 12.
Isotopes are variants of a particular chemical element which differ in number of neutrons. Hence, the mass number of different isotopes of the same element varies and gives us information about the number of neutrons present in that atom at the same time.
The mass number of Carbon-14 is equal to 14.
Atomic number of C-14 = Protons in Carbon-14 = 6
Neutrons in Carbon-14 = Mass Number - Atomic Number
Neutrons in C-14 = 14-6
= 8
Answer D.
The catalyst is not consumed during a chemical reaction, it just changes the path of the reaction to increase the rate of the chemical reaction by lowering the activation energy.