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Periodic Table

The Periodic Table is a tabular arrangement of the elements in increasing order oftheir atomic numbers, so that elements with similar properties are in the same column. There are 18 columns, called groups, and seven rows, which are called periods, in the modern periodic table. Questions about the Periodic Table: its history and creation, trends, groups/families, and periods are asked in our Periodic Table category.

11,273 Questions

When was copper added to the periodic table of elements?

Oh, dude, copper has been chilling on the periodic table since way back in the day. It was discovered way back in ancient times, like before Wi-Fi was even a thing. So yeah, copper has been part of the elemental squad for a looong time.

What are the unknown elements of Mendeleev's Lab of 1869?

Oh, dude, Mendeleev's Lab of 1869 was like the OG chemistry party. The unknown elements back then were basically like the missing guests who RSVP'd but never showed up. It's like trying to throw a surprise party for hydrogen and helium, but they ghost you and leave you with a bunch of uninvited elements crashing your periodic table bash.

Where can you find metals nonmetals and noble gases on the periodic table?

Metals can be found on the left side of the periodic table, including elements such as iron, copper, and gold. Nonmetals are typically located on the right side of the periodic table, such as oxygen, nitrogen, and sulfur. Noble gases are found in Group 18 (VIII) on the far right of the periodic table, including elements like helium, neon, and argon.

Explain why hydrogen is not included in group 1 in most versions of the modern periodic table?

Hydrogen is not included in group 1 in most versions of the modern periodic table because it does not exhibit the typical characteristics of alkali metals found in group 1. While hydrogen can lose an electron to form a positive ion like alkali metals, it can also gain an electron to form a negative ion like halogens. This dual behavior makes hydrogen unique and not easily categorized with alkali metals. Therefore, it is often placed separately at the top of the periodic table.

What does PS stand for on the periodic table?

PS on the periodic table stands for Promethium, which is a radioactive element with the atomic number 61. It belongs to the lanthanide series of elements.

What household items contain elements from the periodic table?

Many household items contain elements from the periodic table. For example, sodium can be found in table salt, chlorine in bleach, and carbon in pencils. Additionally, elements like copper are used in electrical wiring, while aluminum is commonly found in cookware. These elements play essential roles in everyday items we use in our homes.

What elements on the periodic table make up plastic?

Plastics are made through organic chemistry (the study of carbon compounds).

ALKENES are used to make plastics.

Plastics consist of many repeated monomers (small molecules).

The basic elements that make up most plastics are Carbon,Hydrogen,Oxigen,Nitrogen,Chlorine and Sulfur.(good job dumbo you spelled oxYgen wrong)

Why sodium metal is more reactive than magnesium metal?

Sodium metal is more reactive than magnesium metal because it has one electron in its outermost shell, making it easier to lose that electron and form a stable ionic compound. Magnesium, on the other hand, has two electrons in its outermost shell, requiring more energy to lose both electrons and form an ionic compound. This difference in electron configuration leads to sodium exhibiting greater reactivity compared to magnesium.

What are non-examples of periodic table?

Non-examples of the periodic table would include things like the Dewey Decimal System, the Fibonacci sequence, and the Pythagorean theorem. These items are not related to the organization of chemical elements based on their atomic number and chemical properties, which is the primary purpose of the periodic table. The periodic table specifically categorizes elements into periods and groups based on their electron configurations and chemical behavior.

What is 2C12H22O11?

Oh, dude, 2C12H22O11 is just a fancy way of saying sugar. Yeah, like the stuff you put in your coffee or sprinkle on your cereal. So, next time someone asks you what that is, just tell them it's sugar and watch them be like, "Oh, really?"

Why are two of the row of the periodic table separated from the rest of the chart?

Oh honey, those two rows at the bottom of the periodic table are like the misfits at the cool kids' table. They're separated because they're the f-block elements, also known as the lanthanides and actinides. They're down there minding their own business, doing their own thing, and adding a little extra spice to the periodic table.

Is osmium radioactive?

Oh, dude, no way! Osmium is not radioactive. It's actually one of the densest elements on Earth. So, like, you can chill knowing that osmium won't give you any superpowers or turn you into a mutant or anything.

Should you capitalize periodic table?

Yes, "Periodic Table" should be capitalized because it is a proper noun referring to a specific scientific concept. In scientific writing, it is important to follow standard conventions for capitalization to maintain clarity and accuracy. By capitalizing "Periodic Table," you are indicating its significance as a specific and well-defined term in the field of chemistry.

What are the elements called in the first group of the periodic table that have one outer shell electron and is extremely reactive?

Oh, dude, those are the alkali metals. They're like the divas of the periodic table with their one outer shell electron, always causing drama and reacting with everything in sight. You definitely don't want to mess with those guys unless you're ready for some serious fireworks!

What element has 8 protons 9 neutrons and 8 electrons?

The element with 8 protons, 9 neutrons, and 8 electrons is oxygen-17. Oxygen normally has 8 protons and 8 neutrons, but oxygen-17 is a rare isotope with an extra neutron. This gives it a total of 8 protons, 9 neutrons, and 8 electrons.