A covalent bond always includes a pair of electrons.

A.

True

B.

False

What is the Noble gas notation of sulfur (S) ?

Food can spoil through mere exposure to air because it will lose electrons. This loss of electrons creates free radicals, which destroy chemical bonds in the food, causing it to spoil. What is this process called?

How do you get rid of a splinter?

Looking at group 2A of the periodic table, which of these element probably has the lowest ionic radius?

Which statement about ribosomes is correct? Prokaryotic ribosomes are larger than eukaryotic ribosomes. Prokaryotic ribosomes are smaller than eukaryotic ribosomes. Prokaryotic and eukaryotic ribosomes are same in size.

Which element has an ion that is smaller than an ion calcium? Potassium, strontium, cesium, magnesium

A peregrine falcon can travel 537,600 furlong/fortnight. A race car travels 212ft/s. A spider can jump with a maximum velocity of 9,000,000 cm/hr. Which travels the fastest?

how many energy levels (shells) does an atom of oxygen have? How do you know this by looking at the periodic table?

A student needs to use 0.575 moles of sodium chloride in an experiment. How many grams should he mass out?

Which of the following seperation methods is used to seperate plant pigments? Filtration, Chromatography, fractional distillation, simple distillation?