Which of these groups of elements show the least electronegativity?

inner-transition elements

A. halogens

B. alkali metals

C. transition elements

D. alkaline earth metals

Energy leaves the sun as light from region called the?

A sample of an ideal gas at 1.00 atm and a volume of 1.84 L was placed in a weighted balloon and dropped into the ocean. As the sample descended, the water pressure compressed the balloon and reduced its volume. When the pressure had increased to 30.

Zn + 2HCI - -> ZnCl2 + H2 How many moles of hydrogen can you make with 7.9 g Zn? mol 7.90 mol 65.38 mol 0.24

How many molecules of H2O are there in 1.0 g of H20

Whats the difference from a physical change and a chemical change

K is the chemical symbol for which element

Milicent finds a plant in her backyard. It is tall and has large cones. What did Milicent find? moss fern conifer flowering plant

Heat that flows by conduction is the transfer of thermal energy between substances in contact. for this to happen, what must occur? a. the two systems must be the same temperature. b. the two systems must not be touching each another. c.

A flask is charged with 3.00 atm of dinitrogen tetroxide gas and 2.00 atm of nitrogen dioxide gas at 25ºC and allowed to reach equilibrium. N2O4 (g) - ->2 NO2 (g) Kp = 0.

Which of the following represents gamma emission? O A. 164Gd 188TB + ge O B. prc = $TC+7 O C. 1962 1945m + 2 He O D. 199 Eu + 4e - 154 Sm SUBI