What is number of protons of lithium?

3
Lithium/Atomic number

Does lithium have 4 protons?

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.

Does lithium have 2 protons?

The atomic number represents the number of protons in an atom, so Lithium has 3 protons. The atomic mass is the number of protons and neutrons of an element. As seen on a periodic table, Lithium has an atomic mass of 7. We know the proton number is 3, so 7-3 = 4, is our number of neutrons.

How many protons does bromine Br have?

35
Bromine/Atomic number

What are 3 interesting facts about lithium?

Interesting Facts about Lithium

• Although it is a metal, it is soft enough to cut with a knife.
• It is so light it can float on water.
• Lithium fires are difficult to put out.
• Along with hydrogen and helium, lithium was one of the three elements produced in large quantities by the Big Bang.

What are 5 uses of lithium?

Lithium and its compounds have several industrial applications, including heat-resistant glass and ceramics, lithium grease lubricants, flux additives for iron, steel and aluminium production, lithium batteries, and lithium-ion batteries.

Is 9 3 Li a stable isotope of lithium?

Naturally occurring lithium (3Li) is composed of two stable isotopes, lithium-6 and lithium-7, with the latter being far more abundant: about 92.5 percent of the atoms. Lithium-9 has a half-life of 178.3 milliseconds, and lithium-11 has a half-life of about 8.75 milliseconds.

Is Lithium-7 an isotope?

Lithium has two stable isotopes Li-6 and Li-7, the latter being 92.5% in nature (hence relative atomic mass of natural lithium of 6.94).

What is the atomic mass for lithium?

6.941 u
Lithium/Atomic mass

Why is lithium named lithium?

(It was observed to give an intense crimson flame when sprinkled on to a fire.) He deduced that petalite contained an unknown metal, which he called lithium from the Greek word for a stone, lithos, although he never actually produced any. He reasoned that it was a new alkali metal and lighter than sodium.

Why does bromine have 36 electrons?

This is the number that never changes for an element (or else the chemical properties will change!). In a neutral atom the number of protons = the number of electrons. 35 protons = 35 electrons. But Bromine anion with a charge of -1 has one extra electron so 35 +1 = 36 electrons.

How many electrons are in BR -?