What do elements in the first two columns of the periodic table have in common

Give three examples of liquid substances in which you would expect dipole-dipole attractions to be large.

State whether the following statements are true or false (with justification). (a) 1 mol of N2 has more molecules than 1 mol of Ar. (b) 1 mol of N2 has more mass than than 1 mol of Ar. (c) The molar mass of N2 is greater than the molar mass of Ar

A glass of water sits on a table. the temperature of the water is the same as that of the glass. which would move faster, the silicon dioxide (sio2) molecules that make up the glass or the water (h2o) molecules?

In 450 BCE, Greek philosopher Democritus first thought of the existence of tiny particles that compose everything around us. He named them 'atomos', meaning A. Invisible B. Particle C. Indivisible D. None of these Reset Selection

Which of the following includes a wedge. A. axe B. file c. bolt d. hammer

Heat is most closely related to ___ energy. A. Nuclear B. Electrical C. Thermal

How many moles are in 26.4 grams of lithium

What is the independent, dependent, control group and constant: A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight.

Where are two places that scientists obtain scientific knowledge

Which of the following best describes what happens when an ionic bond forms? A) two atoms come together and share electrons in order to fill their octets. B) two atoms give up their electrons in order to form a bond.