Table of Contents
- 1 What do all elements in the same period have in common?
- 2 What properties do noble gases have in common with non metals?
- 3 Is an element that is soft and easy to cut cleanly?
- 4 Do periods have similar properties?
- 5 What does a nucleus contain matter?
- 6 What is inside of a nucleus?
- 7 What are the 92 naturally occurring elements?
- 8 How many elements are liquid in their standard state?
What do all elements in the same period have in common?
Like PERIODic table.). All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.
What properties do noble gases have in common with non metals?
The noble gases have the following properties in common:
- they are non-metals.
- they are very unreactive gases.
- they are colourless.
- they exist as single atoms (they are monatomic)
What is an atom’s nucleus made of?
Atomic nuclei consist of electrically positive protons and electrically neutral neutrons. These are held together by the strongest known fundamental force, called the strong force. The nucleus makes up much less than . 01% of the volume of the atom, but typically contains more than 99.9% of the mass of the atom.
What makes an isotope of an element?
Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element’s atomic number on the Periodic Table. For example, carbon has six protons and is atomic number 6.
Is an element that is soft and easy to cut cleanly?
The ability of a substance to be hammered or rolled into thin sheets is called malleability 7. Is an element that is soft and easy to cut cleanly with a knife likely to be a metal or a nonmetal? – metal 8. The elements in Group 18, which are generally unreactive, are called noble gases.
Do periods have similar properties?
They exhibit similar chemical properties. Elements within the same period have different number of electrons in their valence shells (the number is increasing from left to right) and different valence shell electron configuration. Therefore, elements in the same period are chemically different.
What is the most unreactive non metal on the periodic table?
Noble gases are a group of nonmetals in group 18 that are often described as chemically inert – they are colorless, odorless and highly unreactive. This group includes helium, neon, argon, krypton, xenon, radon, and the synthetic element oganesson.
What are 5 uses of noble gases?
Uses of noble gases
- Helium is used in filling balloons.
- Oxygen -Helium mixture is used in the treatment of asthma.
- Neon is used for filling sodium vapour lamps.
- Argon is used as a carrier gas in gas chromatography.
- Krypton is used in high efficiency miner’s cap lamps.
- Radon is used in radioactive research.
What does a nucleus contain matter?
The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). Atoms have different properties based on the arrangement and number of their basic particles.
What is inside of a nucleus?
The nucleus contains nearly all of the cell’s DNA, surrounded by a network of fibrous intermediate filaments and enveloped in a double membrane called the “nuclear envelope”. The nuclear envelope separates the fluid inside the nucleus, called the nucleoplasm, from the rest of the cell.
Is carbon-13 a radioactive isotope?
By far the most common isotope of carbon is carbon-12 (12C), which contains six neutrons in addition to its six protons. The next heaviest carbon isotope, carbon-13 (13C), has seven neutrons. Unlike 12C and 13C, this isotope is unstable, or radioactive. Over time, a 14C atom will decay into a stable product.
What are 2 examples of isotopes?
For example, carbon-12, carbon-13, and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13, and 14, respectively. The atomic number of carbon is 6, which means that every carbon atom has 6 protons so that the neutron numbers of these isotopes are 6, 7, and 8 respectively.
What are the 92 naturally occurring elements?
There are 92 elements that occur naturally. The elements hydrogen, carbon, nitrogen and oxygen are the elements that make up most living organisms. Some other elements found in living organisms are: magnesium, calcium, phosphorus, sodium, potassium. By the late 1800’s many elements had already been discovered.
How many elements are liquid in their standard state?
This temperature/pressure combo is often called “room conditions.” Two elements are liquid in their standard state: mercury and bromine. Eleven elements are gas in their standard state. All of the noble gases (He, Ne, Ar, Kr, Xe, Rn) as well the halogens flourine and chlorine.
How many elements make up all matter?
All matter is made up of elements which are fundamental substances which cannot be broken down by chemical means. There are 92 elements that occur naturally. The elements hydrogen, carbon, nitrogen and oxygen are the elements that make up most living organisms.
What are the four essential elements of a state?
End of sovereignty means end of the State. That is why sovereignty is accepted as the exclusive property and hallmark of the State. These are the four essential elements of a State. A State comes to be a state only when it has all these elements.