What is the atomic number of a sodium atom that has 11protons and 12 neutrons.

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.

Which compound is an electrolyte? 1. H2O 2. C2H6 3. H3PO4 4. CH3OH

What is the lewis structure for al?

A butterfly has a wingspan of 77 mm and a height of 7 cm. Which is greater the wingspan or the height of butterfly?

What are the pros and cons of the banana with a vaccine embedded in its DNA?

Show that the speed of an electron in the nth bohr orbit of hydrogen is αc/n, where α is the fine structure constant. what would be the speed in a hydrogen-like atom with a nuclear charge of ze?

Most modern forms of transportation are powered by fossil fuels. Carbon dioxide, methane, carbon monoxide, and other gases are released into the atmosphere during the production and combustion of these fuels.

Does the reaction of a burning candle give off or absorb heat

1. Describe the difference between valence and core electrons.

How are deltas and rivers similar?