Answer:
A, B
Explanation:
A) This statement is consistent with Rutherford's nuclear theory as atom is mostly an empty space with tiny particles spread round. Exactly like our solar system in space, where sun be considered as nucleus containing neutron and proton and planets as electrons.
B) Yes ratio of size of atom to nucleus is 100000 is to 1. So, nucleus is quite smaller than the atom.
C) This is inconsistent with Rutherford's nuclear theory as till that time theory of neutron was not discovered.
D) An atom is neutral when no. of electrons( negative charge) is equal to no. of protons(positive charge). Therefore, it is inconsistent.
Answer:
the fossils on some of the continents were in the same spots as fossils on other continents
Explanation:
tell me if i need to explain more. x
Answer:
40%
Explanation:
We'll begin by obtaining the molar mass of MgO. This is illustrated below:
Molar Mass of MgO = 24 + 16 = 40g/mol
Observing the formula MgO, we have 1 atom of O in it.
The percentage composition by mass of oxygen in MgO is given by:
Mass of O/Molar Mass of MgO x 100
= 16/40 x 100 = 40%
Answer:
D. bromine
Explanation:
Highest electronegativity in the period has element closest to the *A group
K Ca Cu Br
It would be C. inherited characteristics