What element has 4 protons and 5 neutrons? 4 protons, 5 neutrons, and 4 electrons are there in an atom of
beryllium
.
What is the symbol of beryllium?
Be
What's the atomic number for beryllium?
4
What is the mass of beryllium?
9.012182 u
What can you make with 4 protons and 4 neutrons?
An atom with five protons and three neutrons in its nucleus would be known as boron-8, while an atom with four protons and four neutrons in its nucleus would be known as
beryllium-8
.
First of all,
beryllium
has total how much electrons and protons, four electrons and four protons. And beryllium has two electrons in its outermost shell.
A
lithium
atom contains 3 protons in its nucleus irrespective of the number of neutrons or electrons. Notice that because the lithium atom always has 3 protons, the atomic number for lithium is always 3. The mass number, however, is 6 in the isotope with 3 neutrons, and 7 in the isotope with 4 neutrons.
Beryllium occurs naturally
in the earth's crust and in the air, soil and water
. Every day, people are exposed naturally to extremely small amounts of beryllium by breathing the air, drinking water and eating food grown in soil. Beryllium is also introduced into our lives through human activities.
| Name | Beryllium | Neutrons | 5 | Electrons | 4 | Atomic Number (Z) | 4 | 9 |
|---|
Silver is a relatively soft, shiny metal
. It tarnishes slowly in air as sulfur compounds react with the surface forming black silver sulfide. Sterling silver contains 92.5% silver. The rest is copper or some other metal.
beryllium (Be), formerly (until 1957) glucinium, chemical element, the lightest member of the
alkaline-earth metals
of Group 2 (IIa) of the periodic table, used in metallurgy as a hardening agent and in many outer space and nuclear applications.
Edit: Also, for clarification,
elements don't have a taste
. Taste is a biological reaction to chemical interactions happening with an element, not a property of the element itself. So, like everything else in chemistry, the taste is decided by the electron configuration of the element.
So, for beryllium, there are 4 protons, 5 neutrons and 4 electrons but to calculate atomic mass number, four electrons won't be counted. Hence the atomic mass number of beryllium will be the sum of 4 protons and 5 neutrons and that will be equal to
9
.
Mass number = number of proton + number of neutron =4+5=
9
.
Group 2A (or IIA)
of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
A boron atom contains five protons,
five neutrons
, and five electrons.
Boron
– Element information, properties and uses | Periodic Table.
A lithium atom contains 3 protons in its nucleus. Notice that because the lithium atom always has 3 protons, the atomic number for lithium is always Z = 3. The mass number, however, is A = 6 for the isotope with 3 neutrons, and
A = 7 for the isotope with 4 neutrons
.
Which of the following is the correct notation for an isotope with 3 protons and 5 neutrons?
8 3 Li
. Which of the following is the most stable isotope? As the mass of the nucleus increases, what happens to the ratio of neutrons to protons in stable isotopes?
