Lithium, which has an atomic number of 3, has _______ electrons in the first shell, and ______ electrons in the second shell.

A basic substance has a low amount of H+, and a pH higher than 7.

What type of bond forms between the atoms in NaCl?

Identify the structure labeled number 4.  

The stomach is a/an ____________, a group of ___________ that collectively carry out a set of tasks.

What type of bond forms between the atoms in O2 gas?

A study is investigating whether a specific fertilizer increases plant growth. In this study, whether or not the plant has fertilizer applied to it is the _____________ variable.

Fifteen randomly selected students are found to be taller than 6 feet. The researchers concluded that the average height of a student is greater than 6 feet. This is an example of experimental bias.

You are using the 300, 150, 100, 75, 60, 50 method to determine the heart rate. You locate an R wave that falls on a bold line on the ECG paper. The next consecutive R wave after your starting points falls directly on the 3rd bold line. This patient’s heart rate is ______ beats per minute. 

In the scientific name, the genus is always capitalized and the species is always lowercase.