Answer:
in my opinion find some stuff to help u with it test if you are aloud to bring in a revision boom into your test and get a good night sleep if you can and try not to get stressed about it
Explanation:
When we move across a period from left to right then there will occur an increase in electronegativity and also there will occur an increase in non-metallic character of the elements.
As sulfur (S) is a group 16 element and chlorine (Cl) is a group 17 element. Hence, sulfur (S) is more metallic in nature than chlorine.
This means that chlorine (S) is less metallic than chlorine (Cl).
Both indium (I) and aluminium (Al) are group 13 elements. And, when we move down a group then there occur an increase in non-metallic character of the elements. As indium belongs to group 13 and period 5 whereas aluminium belongs to group 13 and period 3.
Therefore, aluminium (Al) is more metallic than indium (In).
Arsenic (Ar) is a group 15 element and bromine (Br) is a group 17 element. Therefore, arsenic is more metallic than bromine.
Dmitri Mendeleev made the periodic table in 1869.
Answer:
10
Explanation:
Basically same as last question but the number is before the compound :)
Answer:
The system has 35% of B.
Explanation:
Number of A atoms = 65
Number of B atoms = 35
Mass of atom A = M
Mass of atom B = 18M
Total atoms of the system = 65 + 35= 100
Total of atoms of B = 35
The percentage of B is the system ;
The system has 35% of B.