Phosphorus - P - Protons = 15, Electrons = 15, Neutrons = 16 - Non-Metal
Lithium - Li - Protons = 3, Electrons = 3, Neutrons = 4 - Metal
Nitrogen - N - Protons = 7, Electrons = 7, Neutrons = 7 - Non-Metal
Copper - Cu - Protons = 29, Electrons = 29, Neutrons = 34 - Metal
Neon - Ne - Protons = 10, Electrons = 10, Neutrons = 10 - Non-Metal
sorry i don’t know about the other questions but i thought i could help with the table!
Additional Info:
number of protons = atomic number
number of electrons = atomic number
number of neutrons = mass number - atomic number
S²⁻ cannot be reduced further.
<u>Explanation:</u>
S²⁻ cannot be reduced further
In the periodic table, Sulphur has the atomic number of 16.
So, the arrangement of electrons in the orbits would be 2, 8, 6
The outermost orbit has 6 electrons.
It can gain two more electrons to complete its outermost orbit and the valency of the sulphur then becomes 2-
Therefore, in S²⁻ the valence electrons are complete in the outermost orbit and cannot gain more electrons. Therefore, it cannot get reduced further.
Answer:
2.281*10^28 photons
Explanation:
Data
- Volume of coffee, V = 245 mL
- Temperature change of the coffee, ΔT = 62 - 25 = 37 °C
- Density of coffee, D = 0.997 g/mL
- Specific heat capacity of coffee, cp = 4.184 J/(g*K) = 4.184 J/(g* °C)
- wavelength of the microwave radiation, λ = 12 cm = 0.12 m
Mass of the coffee
m = D*V = 0.997 * 245 = 244.265 g
Energy (heat) absorbed by the coffee
Q = m*cp*ΔT = 244.265 * 4.184 * 37 = 37814.1761 J
Energy of the photon
E = h*c/λ
where h is the Planck constant ( 6.63 x 10^(-34) J*s) and c is the speed of light at vacuum (3*10^8 m/s)
E = 6.63 x 10^(-34)*3*10^8/0.12 = 1.6575*10^(-24) J
number of photons required = total energy required / energy per photon
n = 37814.1761/1.6575*10^(-24) = 2.281*10^28 photons
Correct answer- B the electrons every two elements are arranged in energy levels: a maximum two electrons in the first level. ((( i thinkkk )))
Answer:
A
Explanation:
A mixture is formed when two or more substances are physically mixed together. A compound is formed when two or more substances are chemically combined through a chemical reaction.