Answer : The correct option is, The reactants are at a higher potential energy compared to the products.
Explanation :
Exothermic reaction means energy is released and the overall enthalpy change is negative.
In exothermic reaction, the reactants are at a higher potential energy compared to the products. In other words, we can say that the products are more stable than the reactants.
a. True
b. False
Answer: Option (a) is correct.
Explanation:
A person with less skills needs to work more or practice more on his abilities in order to improve their athletic ability to build a stronger team.
Over encouragement to lesser skilled person can lead to the development of over confidence. As after over encouragement, the less skilled person can have the illusion of knowing each and everything which is not true for anyone.
As no one is perfect, therefore, over-encouraging lesser skilled players can lead to embarrassment.
(2) less energy and a different charge
(3) more energy and the same charge
(4) more energy and a different charge
The electrons in the second shell of this atom have (3) more energy and the same charge compared to the first shell
Bohr's atomic model has shown the energy levels of electrons in the path of the atomic shell
The greater the value of n (the atomic shell, the main quantum number), the greater the energy level
In normal circumstances, electrons fill the shell at the lowest energy level starting from the shell K, L M and then N
When an atom gets energy from outside, the electrons will absorb energy so it moves to higher energy. This situation is called excited
Electrons will return to the original path or a lower energy level because the excited state is unstable. In this condition, the electron will release energy
The electron energy at the nth path can be formulated:
Rh = constant 2.179.10⁻¹⁸ J
So the electron transfer energy (ΔE)
ΔE = E end - E initial
From the electron transfer available, because the value of the Rh constant is the same, the effect is the value of n (shell) ⇒ 1 / n²
Electron configuration of Be (Beryllium) with atomic number 4
1s² 2s² or [He] 2s²
So in the first shell E = -1(n=1), the second shell E = -1/4(n=2)
So the energy value in the second shell is greater than the first shell
While the electron charge is still the same(-1) (such as protons with + charges and neutrons with neutral charges / 0)
statement about electrons and atomic orbitals
Effective nuclear charge
statement about subatomic particles is true
Answer:
7.4
Explanation:
F = m × a
F/a = m
m = 140 / 19
m = 7.4