Please help me out with this please... In the periodic table, elements are ordered by atomic number, the number of protons in an atom's nucleus. Identify the element shown.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

What state of matter is ice a. liquid b. element c. solid d. gas

The rate constant for the reaction below is 6.2 x 10−5 mol l−1 s −1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?