Science question an atom of element a has 7 protons. what would the element's atomic number be?and explain!

The fauces connects which of th following structures to the oropharynx

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?