Question 1

Elements in the same period have the same __.

valence electron

electrons

atomic number

valence shell number

Question 2

Which element has the greatest reactivity? (Refer to a periodic table)

Phosphorous (P)

Chlorine (Cl)

Sodium (Na)

Lithium (Li)

Phosphorus is found only in the earth's crust. where is the lithosphere

A dead or weakened pathogen used to establish immunity would most likely be found in?

Which of these is an advantage of using models to study tectonic plate movements? Actual plate movements can be stopped. Actual plate movements can be made less frequent. Models of the exact material as the original can be made.

A clinical research study is evaluating cells that bridge both the innate and adaptive immune systems. A nurse has identified the dendritic cells (DCs) as a key component. Which statement validates this finding

Dale works for a publishing company. Every time he writes a good article, he gets lots of fan mail expressing support to him. In the context of operant conditioning, the mails that Dale receives are called a

What characteristic distinguishes the five groups of fungi?

A research colleague has provided you with a single cell to identify. briefly describe the steps you would take to determine which domain this cell would most likely belong to.

A new organism is discovered in the forests of Costa Rica. Scientists there determine that the polypeptide sequence of hemoglobin from the new organism has 72 amino acid differences from humans, 65 differences from a gibbon, 49 differences from a

How can evedince from an experiment be explained in a relationship to the hypothesis

The primary function of basal transcription factors is to