A student listed the following characteristics of a hydronium ion: 1) is attracted to negatively charged ions, 2) contains two hydrogen atoms, 3)
contains one oxygen atom, 4) is formed as a result of the dissociation of an H2O molecule. Which statement is incorrect?
A. 1
B. 2
C. 3
D. 4

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons