What element on the periodic table has a mass number of 50.9?

Express your answer in condensed form in order of increasing orbital energy as a string without blank space between orbitals. for example, [he]2s22p2should be entered as [he]2s^22p^2.

Predict the color of the flame for the compound sodium hydroxide, naoh. explain your reasoning.

What is a item that has metalloids in it

A 25.0 g piece of aluminum (which has a molar heat capacity of 24.03 J/mol°C) is heated to 86.4°C and dropped into a calorimeter containing water (the specific heat capacity of water is 4.18 J/g°C) initially at 21.1°C.

Name and explain 2 positives of renewable energy

What makes an acid or base strong?

In a laboratory, Carlos places one plate with grape jelly and another plate with cooked brown rice inside an ant farm. The next day, he finds that both plates are filled with ants.

Which statement is true at STP? (The atomic mass of Zn is 65.39 u.)

A sample of gas has a volume of 2.4 L and a pressure of 1.2 atm. What would the pressure of the same gas sample be if the volume is reduced to 1.8L at a constant temperature?

The elements most likely to form more than type of ion are the ... A. Transition metals B. alkali metals C. halogens D. alkaline earth metals