Answer:
the protons
Explanation:
the number of protons is constant for each sample of the element. If the number of protons differs, then it is a different element.
Answer:
quartz (SiO2)n
Explanation:
Melting point is defined as the temperature or point at which the substances change its state from solid to liquid.
Quartz (SiO2)n has high melting point than O2 because Quartz (SiO2)n is found in the form of hard, crystalline mineral that is made up of silicon and oxygen atoms having strong covalent bonds between all the atoms. So, a lot of energy is required to break the bond between the atoms and it has a high melting point.
Hence, the correct answer is quartz (SiO2)n.
Answer- The given statement about scientific method is true.
Explanation- The main purpose of applying scientific method is to gain knowledge or learning about something and get to know about that thing one has to go to a specific path of scepticism Then on the basis of the assumptions made the observation have to be interpreted accordingly .
To get to know about something some assumptions or hypothesis have to be made this is the only way to proceed for or any field where scientific method is applied.
The valency of an atom is equal to the number of electrons in the outer shell if that number is four or less. Otherwise, the valency is equal to eight minus the number of electrons in the outer shell. Once you know the number of electrons, you can easily calculate the valency.
Hello.
The answer would be <span>A. Three feet of concrete.
Have a nice day.</span>
