Which is true about metalloids?

a. are more metallic than non-metallic

b. next to the "staircase" on the periodic table

c. always have 4 e - in the valence shell

d. examples include Al and B

Which of the following emerging technologies uses the principle of chromosomes to identify suspects?

Which element has an atomic number of 6? lithium boron carbon oxygen

It kinda healing it is kinda doing well

Coffee has a pH of about 5. Coffee is?

A change in what factor will affect the rate of reaction only when gases are involved

What happens to the speed of light when waves travel through a denser medium

A 1.79-L flask is filled with propane gas (C3H8), at 1.00 atm and - 16.1°C. What is the mass of the propane in the flask?

If an amino acid contained a hydrocarbon (a group of multiple carbons and hydrogens linked together) as its side group, in which of the following categories could it be appropriately designated? A) hydrophilicB) polar C) nonpolarD) basicE) acidic

Which atom can bond with each other to form chains, rings or networks? (1) carbon atoms (2) hydrogen atoms (3) oxygen atoms (4) nitrogen atoms

How many electrons in an atom can have each of the following quantum number or sublevel designations? (a) 4p (b) n = 3, l = 1, m1 = + 1 (c) n = 5, l = 3