Which of the following answer choices contains a covalent bond?

Select one:

a. KF

b. CaS

c. NO

d. MgS

Calculate the energy change for the reaction K (g) + Br (g) → K + (g) + Br - (g) given the following ionization energy (IE) and electron affinity (EA) values IE EA K: 419 kJ/mol 48 kJ/mol Br: 1140 kJ/mol 324 kJ/mol

Electrons are held in an atom by attraction to what particle or location? a. Attraction to the positively charged protons in the nucleus b. Attraction to the lowest electron shell c. Attraction to the magnetic neutrons in the nucleus d.

Compare electron energy levels and nuclear rings (both physically and chemically)

What is the balanced equation for combustion of dicarbon hexahydride

A student inflates a balloon for a party inside her house, where the temperature is 23°C. She then takes the balloon outside, where the temperature is 12°C. What most likely will happen to the balloon?

Which property can be defined as the ability of a substance to be hammered into thin sheets

Select the group of organelles that is common to both plant cells and animal cells. A. nucleus, cytoplasm, ribosomes, chloroplasts B. cell wall, ribosomes, cell membrane, mitochondria C. cytoplasm, mitochondria, cell wall, nucleus D.

A compound is found to have a composition of 70.4% carbon and 29.6% hydrogen, by mass. what is the empirical formula for the compound?

As you go down a family or group on the periodic table * the atoms become smaller and smaller. the elements become less reactive. the elements become more reactive. the atoms have more and more valence electrons.

What is the name of the horizontal rows in the periodic table?