Periodic Table

Chemical Property

Trinitrogen Heptafluoride

At room temperature, all noble gases are gases. These include helium, neon, argon, krypton, xenon, and radon.

Group 2 elements of the periodic table have a 2+ charge and are reactive. These elements include beryllium, magnesium, calcium, strontium, barium, and radium. They readily form 2+ cations by losing two electrons in chemical reactions.

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Lutetium itself does not have a distinct odor. It is a silvery-white metal and is typically odorless in its elemental form.

The pair of elements with the most similar chemical properties are lithium (Li) and sodium (Na). They belong to the same group in the periodic table (Group 1) and exhibit similar reactivity and chemical behavior due to having one valence electron.

Yes, indium needs to gain 3 electrons to achieve a full outer shell because it has 3 electrons in its outermost shell. By gaining 3 electrons, indium can achieve a stable octet configuration like the noble gases.

Tungsten is preferred over nichrome in bulbs because it has a higher melting point and can withstand higher temperatures without sagging or degrading. This makes tungsten more suitable for the high heat generated in a light bulb filament. Additionally, tungsten has a higher resistance, allowing it to produce more light for a given amount of electrical power input compared to nichrome.

Yes, sulfur can dissolve in aqua regia, a mixture of concentrated nitric acid and hydrochloric acid. When sulfur is added to aqua regia, it reacts to form sulfur dioxide gas and other products.

Yes, elements can be ordered by their atomic number. The atomic number of an element corresponds to the number of protons in an atom's nucleus, and elements are arranged in the periodic table from lowest to highest atomic number.

Alkaline metals are extremely reactive to H20. Since there is moisture in our skin, we should avoid handling it without gloves. This why the more reactive ones are stored in oil, to avoid them reacting to the moisture in the air.

Holmium is a rare earth element with the atomic number 67, often used in medical and environmental applications due to its magnetic properties. Ytterbium is another rare earth element with the atomic number 70, commonly used in lasers, nuclear reactors, and certain medical imaging devices.

The periodic table organizes elements based on their atomic number and chemical properties. It illustrates the elements in a systematic way, showing their relationships and similarities, such as periodic trends in properties like atomic size and reactivity. This organization helps us understand the behavior of elements and predict their interactions in chemical reactions.

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Thulium, with the chemical symbol Tm, is the chemical element with the atomic number 69.

The horizontal rows in the periodic table are called periods, and the vertical columns are called groups or families. Periods indicate the number of electron shells an element has, while groups determine the number of valence electrons.

Group number 1 = Valency 1+
group number 2 = valency 2+
group number 3 = valency 3+
group number 4 = valency 4+ and 4- (some cases) group number 5 = valency 3-
group number 6 = valency 2-
group number 7 = valency 1-
group number 8 = valency 0


For the transition elements they will either state Copper (III) Sulphate or it will be like Cu2(SO4)3
You can find the valency by the base of sulphate and you know its positive because metals are always positive and are written in the left.




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One well-known heavy element is uranium. It is commonly used as a fuel in nuclear reactors and is known for its radioactive properties.

The space surrounding the nucleus.

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These conditions are used becauase they produce the optimum amount of yield of ammonia at the cheapest rate.

Ca stands for calcium on the periodic table for the first 2 letters of calcium.