Explanation:
Sodium and potassium are in the same group on the periodic table because they both have similar number of valence electrons (1 electron) in their shells
Na = 2,8,1
K = 2,8,8,1
Answer:
The pressure is 0,10 atm (or 76 mmHg)
Explanation:
Read the paper for the explanation and solution of the problem
I believe it's 1,100 to 1,500 sunspots.
Answer:
Solid Osmium transition metal reacts with Oxygen gas to produce solid Osmium tetroxide.
Os(s) + 2O₂(g) -> OsO₄(s)
Explanation:
Osmium tetroxide is another way of writing Osmium (VIII) oxide.
Leaving powdered osmium exposed to air in a room will slowly create osmium tetroxide at room temperature.
Similarly, osmium tetroxide vapor will readily be released from a liquid solution at room temperature.
The correcr anwer is B. The chemical bond between two oxygen atoms is a covalent bond, specifically double covalent bond. The two atoms share two pairs of electrons in order to achieve the most stable structure. Other examples are CO2 and C2H4.