Which of these pairs of elements have the same number of valence electrons?

phosphorus (P) and chlorine (Cl)

berylium (Be) and calcium (Ca)

chlorine (Cl) and helium (He)

oxygen (O) and carbon (C)

What kind of bond is created by week electrical attraction between polar molecules

Explain why it is more difficult to measure the temperature of a solid than of a liquid

How do liquids and gas transfer heat?

In the reaction, 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g), which of the reactants or products is in the gas phase? Na H2O NaOH H2

Larisa pumps up a soccer ball until it has a gauge pressure of 61 kilopascals. The volume of the ball is 5.2 liters. The air temperature is 32°C, and the outside air is at standard pressure. How many moles of air are in the ball? A. 0.13 mol B. 0.

What are some solid mixtures in a classroom

What is the electron configuration of aluminum?

What is the volume of an object with a height of 2.3cm, a width of 2.4cm, a mass of 17.5g, and a length of 20cm?

Is layers of sediment forming at the bottom of the ocean erosion?

How to find the better buy of two of the same item, but they have different units of measurements and different costs.?