You think probable to lithium.

Helium is definitely a NOBLE(Inert) gas.

The number in the subscript of a chemical formula tells the number of that atom in a molecule. For example, in H2O, the 2 tells you there are 2 hydrogen atoms in the water molecule. in C3H8, there are 3 carbon atoms and 8 hydrogen atoms as reflected by the 3 and 8 in the formula respectively.

For any element in ther periodic table., two numbers are given. They are the Atomic No. and the Atomic Mass.

The Atomic Number indicates the elements position in the periodic table.

The number of protons in the element

The number of electrons in the nuetrally charged element.

The Atomic mass is the total of all the protons and neutrons in the nucleus of an atom .

So to find the number of neutrons in an element , the difference between the Atomic Mass and the Atomic Number is the number of neutrons present.

Two examples ; -

hydrogen ; [1/1] H ; 1 - 1 = 0 so no neutrons.

chlorine ; [35/17]Cl ; 35-17 = 18 so 18 neutrons present.

NB The larger number is the Atomic Mass, usually printed at the top left of a given element. The small number is the Atomic Number, usually printed at the bottom(left) of any given element.

Neon is a Noble Gas.

Francium and Fluorine. They would react instantaneously and explosively.

However, this would never be done in an open lab. , because francium is radio-active.

However, Sodium (Grp (I)) and Chlorine (Grp(VII)), will react in a gas jar in the lab. But less vigorously than the above two.

The Atmoic Number is the ;-

#1 position in the periodic table.

#2 the number of protons in the nucleus

#3 the number of electrons around the nucleus for a neutrally charged atom.

Elements in Group 14 on the Periodic Table have similar properties to carbon. These elements are carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl). Each of these elements has two electrons in the outermost p orbital, the electron configuration ns2np2, and they tend to adopt oxidation sates of +4 (+2 for the heavier elements due to the inert pair effect). Silicon is most similar to carbon.

Potassium has the symbol 'K' . The 'K' is from Latin and means 'Kalium'.

The chemical symbol for argentum is NOT 'ag' , but 'Ag'.

Ag ( Argentum is the Latin for Silver).

NB For all elemental symbols.

#1 A single letter symbol is ALWAYS a CAPITAL letter. e.g. 'C' Carbon.

#2 A two letter symbol is written; ffirst letter is a capital letter and the second letter is always lower/small case. eg/ Au( Aurum is Latin for Gold).

NB 'Ar' is the noble gas 'Argon'.

'K' in the periodic table is the symbol for potassium . Its Latin name being 'Kalium' , hence the symbol 'K'.

NB. One letter elemental symbols are ALWAYS a CAPITAL letter. NOT small case 'k'.

Two letter elemental symbols have first letter a capital letter and the second letter as lower/small case. e.g. 'Na' Sodium (Nadium).

NaNO3 is NOT in the Periodic Table, because it is a molecule, NOT an element.

NaNO3 is sodium nitrate. It is a combination of the followinf elements which are in the periodic table. : -

1 x sodium(Na)

1 x nitrogen(N)

3 x oxygen (O)

curium belongs to the actinide series on the periodic table. The actinides are a group of elements in the seventh period of the periodic table, and they follow actinium (Ac) and precede lawrencium (Lr). The actinide series includes elements with atomic numbers from 89 to 103. Curium has the atomic number 96 and is represented by the symbol Cm.

what was dmitris favorite color

Because there were gaps in the periodic table, which he invented. Unlike other scientist of the time who tried to make the elements fit theircategorising system, such as Newlands and his law of octaves, Mendeleev came to the conclusion that they had not discovered all the elements as he noticed patterns that allowed you to categorise elements if you left gaps that undiscovered elements could fill.

Solids melt on heating. A2. But if you are thinking of the destruction of the material, perhaps pyrolysis is what you seek.

Phosphorus has two valencies 3 and 5.

3 - in compounds such as PH3, PCl3, P4O6

5 - PCl5, P4O10

In terms of cordination, the "count" of all the atoms around a P atom it can have 2- 9 atoms around it. Examples are below:-

2 - in OPCH2

3 - in PH3

4 - in PO43-

5 - in PF5

6 - in PF6-

And in some phosphides where there bond is more ionic even higher coordination numbers are known:-

7 - in crystals of Ta2P

8 - in crystals of Hf2P

9 - Ti3P

The element that has the orbital configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2 is Germanium (Ge). It could also be written as [Ar] 4s2 3d10 4p2.

Xenon as it is a noble gas. Noble gases are inert and do not react with anything.

Selenium is a solid

Chlorine is a green coloured highly reactive poisonous gas.

Carbon is a non-metallic solid.

What does lgb mean in gold

There is no element with the symbol "tn" in the periodic table. The periodic table consists of 118 known elements, each with its own unique symbol.

It was recognized by the inventor of the Periodic table that these empty spaces are for elements/isotopes that would be discovered someday. Dmitri Mendeleev is generally credited with the publication, in 1869, of the first widely recognized periodic table. He developed his table to illustrate periodic trends in the properties of the then-known elements. Mendeleev also predicted some properties of then-unknown elements that would be expected to fill gaps in this table.

He had around 17 siblings (though it’s debated), and though a number of them we still don’t know, 8 of the 14 surviving siblings and of the 17 overall siblings are known. Do correct me if I am wrong, for I am not one to purposefully spread misinformation; on that note I definitely do not know the order of siblings off the top of my head but here they are anyways: Vasily, Olga, Vladimir, Masha, Pavel, Ivan, Maria and Anna.

Nowadays usually put in the same group as the alkali metals, group1. Hydrogen is an odd-ball elemnt. It shares no characteristics aprt from 1 electron in valence shell with the alkali metals.

Some older versions put in TWO places, with the alkali metals (group1) and with the halogens, group 17. Reasonable as H loses one electron (like a group 1) and gains one (like a halogen) when it forms the hydride ion.

The vertical sections of the periodic table are called groups or columns.