There are 118 known elements
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Answer:</h3>
Trough
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Explanation:</h3>
We need to answer the following questions
What is a wave?
- A wave refers to a transmission of a disturbance from one point to another. It involves transfer of energy from the source to other points.
What are the major types of wave?
- Waves may be classified as longitudinal waves or transverse wave based on the vibration of particles relative to the direction of transmission.
What is a transverse wave?
- A transverse wave is a wave in which the vibration of particles is perpendicular to the direction of transmission of the wave.
- This type of wave contains highest points known as crests and lowest points known as troughs.
There are O-H bonds in H2O. They have the intramolecular force of polar covalent bond.
Maybe gas? because you can’t see it and it’s formed during a chemical reaction
