Identify the period or group number described for the following case:

a) contains elements C, N and O

b) start with helium

c) Contains the alkali metals

d) end with neon

What's a design constraint?

Pepsi brand soft drinks contain 38 mg of caffeine (molar mass = 194.19 g/mol) for every serving (355 mL of solution) What is the molarity of caffeine in this solution?

If 29.0 l of methane, ch4, undergoes complete combustion at 0.961 atm and 140c, how many liters of each product would be present at the same temperature and pressure

What gas is produced when calcium metal is dropped in water

How does symmetry extend to our senses

What part of an atom do we change for isotopes

The Safe Drinking Water Act (SDWA) sets a limit for mercury-a toxin to the central nervous system-at 0.002 mg/L. Water suppliers must periodically test their water to ensure that mercury levels do not exceed 0.002 mg/L.

The smallest unit of an element is a blank

How many sodium atoms will create an ionic bond with sulfur?

Rank the elements from smallest to largest electronegativity negativity (smallest at top) 1. N 2. P 3. As 4. Sb