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Which element contains 2 protons less than krypton?
Element 34, which is selenium, contains 2 protons less than krypton. Krypton has 36 protons, while selenium has 34 protons.
What is more reactive oxygen or selenium?
Oxygen is more reactive than selenium. Oxygen is a highly reactive element that readily forms compounds with other elements, while selenium is less reactive in comparison. Oxygen's reactivity is evident in its ability to support combustion and oxidation reactions, whereas selenium's reactivity is more limited due to its position in the periodic table.
How does density of helium compare to density of oxygen and nitrogen?
Helium is lighter (less dense) than oxygen & nitrogen.
Is selenium non reactive?
Selenium can be reactive and form compounds with other elements. It reacts with oxygen to form oxides and with water to form various compounds. However, it is less reactive compared to other elements in the same group like sulfur and tellurium.
How does density of helium compare to the density of oxygen and nitrogen?
Helium is less dense than oxygen and nitrogen. Helium is the second lightest and least dense gas, while oxygen and nitrogen are heavier gases. This is why helium is often used to lift balloons, as it is less dense than the surrounding air.
Which element contains 2 protons less than krypton?
Element 34, which is selenium, contains 2 protons less than krypton. Krypton has 36 protons, while selenium has 34 protons.
What is more reactive oxygen or selenium?
Oxygen is more reactive than selenium. Oxygen is a highly reactive element that readily forms compounds with other elements, while selenium is less reactive in comparison. Oxygen's reactivity is evident in its ability to support combustion and oxidation reactions, whereas selenium's reactivity is more limited due to its position in the periodic table.
How does density of helium compare to density of oxygen and nitrogen?
Helium is lighter (less dense) than oxygen & nitrogen.
What element has an atomic mass greater than 75 but less than 79?
Element 34, Selenium, has an atomic mass of about 78.96.
Is the oxygen less at high altitudes?
Yes. Air is less dense at higher altitudes, so the oxygen is at a lower concentration.
Does the composition of air change from layer to layer?
yes, the air becomes less dense and there is less oxygen
Why does less dense wood burn faster?
more space for air (oxygen)
Which element is likely to be the most brittle out of selenium cobalt platinum or zinc?
Selenium is the most brittle of the elements listed: The others are all full metals, but selenium is only a semi-metal or a metalloid, and ductility, the negative of brittleness, is a property primarily of metals.
Is oxide an element or an compound?
An oxide is a compound that contains oxygen and at least one other element that is less electronegative than oxygen.
What is the least dense thing?
Hydrogen gas is considered the least dense element. It is less dense than air, which is why it is often used in balloons.
Which element ha properties most similar to sulfur?
Selenium, the element immediately below sulfur in the same column of a wide form periodic table. (The element immediately above sulfur in the same column, oxygen, is the lightest element in the column, and these lightest elements in a column of main group elements often have chemical properties somewhat different from all the other elements in the column. Sulfur, for example, has a much lower electronegativity than oxygen, while the difference between electronegativities of selenium and sulfur is much less.)
Is selenium non reactive?
Selenium can be reactive and form compounds with other elements. It reacts with oxygen to form oxides and with water to form various compounds. However, it is less reactive compared to other elements in the same group like sulfur and tellurium.
