Answer:
Explanation:
Step 1. Identify the Group that contains X
We look at the consecutive ionization energies and hunt for a big jump between them
We see a big jump between n = 2 and n = 3. This indicates that X has two valence electrons.
We can easily remove two electrons, but the third electron requires much more energy. That electron must be in the stable, filled, inner core.
So, X is in Group 2 and P is in Group 15.
Step 2. Identify the Compound
X can lose two valence electrons to reach a stable octet, and P can do the same by gaining three electrons.
We must have 3 X atoms for every 2 P atoms.
The formula of the compound is 
.
Answer:
The answer to your question is: a = 2.1 m/s²
Explanation:
Data
Acceleration : ?
Mass = 2000 kg
Force = 4200 N
Formula
Newton's second law of motion F = ma
a = F / m
Substitution
a = 4200 N / 2000 kg
a = 2.1 m/s²
Answer is: the average atomic mass of 125 atoms of uranium is 235.88.
ω(U-234) = 10 ÷ 125.
ω(U-234) = 0.080.
ω(U-235) = 75 ÷ 125.
ω(U-235) = 0.60.
ω(U-238) = 40 ÷ 125.
ω(U-238) = 0.320.
Average atomic mass of atoms of uranium =
Ar(U-234) · ω(U-234) + Ar(U-235) · ω(U-235) + Ar(U-238) · ω(U-238).
Average atomic mass of atoms of uranium =
234 · 0.08 + 235 · 0.6 + 238 · 0.32.
Average atomic mass of atoms of uranium = 18.72 + 141 + 76.16.
Average atomic mass of atoms of uranium = 235.88.
Answer:
Water has polar O-H bonds. The negative O atoms attract the positive H atoms in nearby molecules, leading to the unusually strong type of dipole-dipole force called a hydrogen bond.
Explanation:
Answer: The shape of an orbital describes a surface that encompasses about 90% of the probability of finding an electron around a nucleus.
Explanation:
An orbital is described as a region in Space around which there is a high probability of finding an electron.
Orbitals possess various shapes. The shape of an orbital describes the region around the nucleus within which an electron in a given energy level may be found with a greater probability.
