What element is a gas and has 48 neutrons?

Name	Krypton
Atomic Mass	83.8 atomic mass units
Number of Protons	36
Number of Neutrons	48
Number of Electrons	36

In respect to this, what element is in period 2 and has an atomic mass of 11?

Boron (B) is the chemical element with atomic number 5, occurring as ¹⁰B and ¹¹B. At standard temperature and pressure, boron is a trivalent metalloid that has several different allotropes. Amorphous boron is a brown powder formed as a product of many chemical reactions.

Likewise, what element is in period 5 and has 51 neutrons? #40 - Zirconium - Zr.

Furthermore, what element has 4 neutrons and is metallic?

beryllium

What element has a nuclear charge of 48?

Cadmium - Element information, properties and uses | Periodic Table.

What is the heaviest element?

uranium

Which element has an AR value of 32?

Germanium - Element information, properties and uses | Periodic Table.

What element has 51 neutrons?

Antimony

What are the first 50 elements?

Terms in this set (50)

H. Hydrogen.
He. Helium.
Li. Lithium.
Be. Beryllium.
B. Boron.
C. Carbon.
N. Nitrogen.
O. Oxygen.

What are the lightest elements?

The lightest chemical elements are hydrogen and helium, both created by Big Bang nucleosynthesis during the first 20 minutes of the universe in a ratio of around 3:1 by mass (or 12:1 by number of atoms), along with tiny traces of the next two elements, lithium and beryllium.

Which element has an AR value of 16?

Chemistry : List of Periodic Table Elements Sorted by: Atomic number

No.	Atomic Weight	Sym.
16	32.065	S
17	35.453	Cl
18	39.948	Ar
19	39.098	K

How do you find the electrons?

The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules.

The number of protons in the nucleus of the atom is equal to the atomic number (Z).
The number of electrons in a neutral atom is equal to the number of protons.

Why does the second period have 8 elements?

The elements are ordered into periods based on which electron shells are being filled (from left to right). In the second period, the second shell is being filled. And so on. There are 8 elements in period 2 because all those elements have electrons in the second shell and no electrons in the third shell.

What is the second most reactive metal?

So we just covered the alkali metals in Group I. You will find the alkaline earth metals right next door in Group II. This is the second most reactive family of elements in the periodic table.

What is the name of the halogen that is in period 3?

Chlorine is a halogen in group 17 and period 3.

Which is more reactive oxygen or fluorine?

Fluorine is the most reactive because it has the strongest attraction for oxygen. Since electronegativity decreases going to the left of the periodic table, oxygen is the second most reactive element on the list. Nitrogen is the third most reactive.

What element has 34 neutrons?

Copper

What is the radioactive element in Period 5?

technetium

What is the number of valence electrons in phosphorus?

five

How many protons neutrons and electrons does copper have?

Copper has an atomic number of 29, so it contains 29 protons and 29 electrons. The atomic weight (sometimes called atomic mass) of an atom is approximated by the sum of the number of protons and the number of neutrons in the nucleus of the atom.

What is the name of the noble gas that is in Period 6?

Noble gas

Noble gases
5	Xenon (Xe) 54
6	Radon (Rn) 86
7	Oganesson (Og) 118
Legend primordial element element by radioactive decay Atomic number color: red=gas

What element has 4 neutrons and is a metal?