2018年2月24日 · A glowing splint relights itself in oxygen gas. When you have created oxygen gas, you can do the following test. Light a splint, but let it sit for a while until it almost burns out. When it is glowing faintly, put the splint in the test tube with oxygen. The splint should start glowing and burning again. If it does, then oxygen gas is present and the test for oxygen is …

An isotope is a variant of an element in which it has an equal number or protons but a varied number of neutrons. The notation of an isotope occurs by adding a subscipt and superscript to the left side of an element such as 238 92U (uranium isotope)

2016年8月25日 · Oxygen is in Group VI, so there are 6 valence electrons in the oxygen ATOM. For oxygen, Z=8. If there are 8 protons in the oxygen nucleus, the atom must also contain 8 negative charges, i.e. 8 electrons. Two of these electrons are inner core, and are not conceived to participate in bonding. The remaining 6 are valence electrons, which participate in bonding …

2015年3月2日 · Beryllium oxide. The ionic compound containing beryllium and oxygen is beryllium oxide. The beryllium ion has a charge of "2"^+" and has the symbol "Be"^(2+)". The oxide ion has a charge of "2"^-" and has the symbol "O"^(2-)". The formula unit for beryllium oxide is "BeO". BeO can be produced by the reaction between beryllium and oxygen. In this reaction, each Be …

2016年9月15日 · The electron configuration for oxygen is: 1s^2 2s^2 2p^4 This video will walk you through the step of writing orbital diagram. The video uses Kr as an example, but the process is exactly as the same as what you need to do for oxygen. Hope this helps!

2015年1月2日 · "How many moles of oxygen are in 54.3 g of oxygen?" Here is where molar mass comes into play. We know that one mole of oxygen weighs approximately 16.0 grams, so 54.3 "g of oxygen" * ("1 mole")/("16.0 g") = 3.39 "moles" "How many moles of oxygen are needed for the combustion" "of 12.0 g of methane?" Questions like this make use of mole ratios.

2014年4月15日 · Oxygen has 6 valence electrons. A way to remember this is to note that it is in column 16 of the periodic table. For the representative elements (columns 1, 2, 13-18), the digit in the units place of the column number is the same as the number of valence electrons. Elements in column 1 have one valence electrons, elements in column 13 have 3 valence electrons, etc. …

If oxygen is removed from a sample of air as iron rusts, what happens to the partial pressure of oxygen in the air? If the total atmospheric pressure of a planet was 890 mmHg and the gases in the atmosphere were 10% oxygen, 80% nitrogen, 9.5% carbon dioxide, and .5% other gases, what is the partial pressure of each gas?

Electrons are divided into several energy levels (n) which have n sublevels. This means the first has one sublevel, the second has two etc named s, p, d, and f.

Percent composition in chemistry typically refers to the percent each element is of the compound's total mass. The basic equation = mass of element / mass of compound X 100% For instance, if you had a 80.0 g sample of a compound that was 20.0 g element X and 60.0 g element y then the percent composition of each element would be: