covalent bonds can form between two nonmetal atoms
covalent bonds can form between atoms of the same element
covalent bonds can form between atoms of different elements
Answer: Protons
WHY?
Changing electrons will only result in the same element having different charges and hence, changing it's chemical properties.
Changing neutrons will not change an element but it will result in an isotope forming instead. (Isotopes are elements of the same type with different neutron numbers.)
However, changing the proton number would immediately change the nucleus composition, resulting in a change in element with a negative charge as there are more electrons than protons. This results in a expansion in valance electrons's distance from the nucleus. This results in a change in chemical properties of the element.
Therefore, a change in Protons is the answer.
Wavelength is measured from crest to crest.
Mass of water : 29.904 g
<h3>Further explanation</h3>
Heat can be formulated
Q=m.c.Δt
Q, heat, J
m,mass, g
c, specific heat, j/g C
Δt,temperature, C
Answer:
Spring constant: .
Work done: .
Explanation:
Convert all values to SI units.
- Length change: ;
- Mass of the weight: .
Assume that the spring-mass system is vertical and is placed on the surface of the earth. The gravitational acceleration constant will be equal to .
Gravitational pull on the weight:
.
That's also the size of the force on the spring. .
The spring constant is the size of the force required to deshape the spring (by stretching, in this case) by unit length.
.
Assume that there's no energy loss in this process. The work done on the spring is the same as the elastic potential energy that it gains:
.