The valence level of an atom refers to the number of electrons that reside in the upper most energy level. Nitrogen has an atomic number of 7 and therefore has 7 electrons. The first energy level (1) holds 2 electrons, leaving 5 electrons to reside in the second energy level (2s and 2p). Therefore the valence of nitrogen is 5.
Answer:
A higher concentration will increase rate of reaction because in a conc substance the particles are more clustered together and this causes more effective collisions thus increasing the rate of reaction.
Answer:
A. higher, lower
Explanation:
- Stronger intermolecular bonds require more energy and therefore create higher boiling points.
- Stonger intermolecular bonds create stronger interactions,which causes the vapor pressure to lower.
- Hope that helped! Please let me know if you need further explanation.
The focal length of the mirror is 15 cm
From the question given above, the following data were obtained:
Object distance (u) = 30 cm
Image distance (v) = 30 cm
<h3>Focal length (f) =? </h3>
The focal length of the mirror can be obtained as follow:
<h3>Invert </h3><h3>f = 15 cm</h3>
Therefore, the focal length of the mirror is 15 cm
Learn more: brainly.com/question/1392083
Answer:
Here's link to the answer:
bittuly/3a8Nt8
Explanation:
