Answer:
Atom X and Atom Y occupy the same position in the periodic table because they are isotopes
Explanation:
The table is as follow;
Atom/Charged particle # of neutrons Mass #
X 6 12
Y 7 13
As we know the Mass number is the total number of protons and neutrons in the nucleus of an atom so,
Mass # = # of Protons + # of Neutrons
Solving above equation for protons,
# of Protons = Mass # - No. of Neutrons
For Atom X:
# of Protons = 12 - 6
# of Protons = 6
For Atom Y:
# of Protons = 13 - 7
# of Protons = 6
Hence, it can be concluded that the number of protons for both atoms are the same. Also, we also know that atoms having same no. of protons (atomic number) are the same elements.
Conclusion:
Atom X and Atom Y are two isotopes of Carbon with atomic number 12. One isotope has a mass number of 13 and have a chemical symbol of ¹³₆C while the other has mass number of 12 and with chemical symbol of ¹²₆C.
True, they are non-metal
And it's metal, not mental XD
O two gained
Fe three lost
Br one gained
Ni two lost
K one lost
F one gained
P three gained
-=gained as electrons have a negative charge
+=lost electrons
Answer:
The products have a higher heat content than the reactants.
Explanation:
The statement above is not true for an exothermic reaction because in an exothermic reaction heat is released to the surroundings. This simply means that the total energy of the products is less than that of the reactants.
Answer:
1. Density can be used to identify a substance
2. Density can be used to ascertain whether a substance will float in water.
Explanation:
The calculation of the density of a substance can be used to identify the substance. If the density of a substance is calculated accurately, and compared with a table of standard densities, then we can identify that substance.
Also, density determines whether an object will float or sink in water. If an object is less dense than water then it will float in water. If it is denser than water, then it will sink in water.
