Calcium is also the 5th most abundant element present in the human body.Calcium is the 5th most abundant element (by mass) found in the earth’s crust.Our teeth and bones contain calcium in it.Calcium is a very essential element for all living organisms.Interesting facts about calcium element are mentioned below. So the last electron of calcium enters the s-subshell or s-orbital. The simple answer: The elements will lie in the s, p, d or f block will completely depend upon the subshell in which the last electron will enter.įor example the electron configuration of calcium is 4s 2. How can you determine the blocks-wise position of elements? Protons 20 Neutrons 20 Electrons 20 Symbol Ca Atomic massĢ, 8, 8, 2 Electronic configuration 4s 2 Atomic radiusĢ31 picometers (van der Waals radius) Valence electronsĢ 1st Ionization energy 6.113 eV ElectronegativityįCC (Face centered cubic) Melting point 1115 K or 842 ☌ or 1548 ☏ Boiling point 1757 K or 1484 ☌ or 2703 ☏ Density 1.55 g/cm 3 Main isotope 40Ca Who discovered Calcium and when?īefore knowing this reason, first of all I want to ask you a simple question. Let’s dive right into it! Calcium Element (Ca) Information Appearanceĭull silvery grey color State (at STP) Solid Position in Periodic table So if you want to know anything about Calcium element, then this guide is for you. In fact, the table mentioned below is the perfect information box (Which gives you every single detail about the Calcium element in Periodic table.) The Standard English unit is pounds mass per cubic foot ( lbm/ft 3).Ĭalcium – Properties Summary Element Calcium Atomic Number 20 Symbol Ca Element Category Alkaline Earth Metal Phase at STP Solid Atomic Mass 40.078 Density at STP 1.55 Electron Configuration 4s2 Possible Oxidation States +2 Electron Affinity 2.37 Electronegativity 1 1st Ionization Energy 6.1132 Year of Discovery 1808 Discoverer Davy, Sir Humphry Thermal properties Melting Point 842 Boiling Point 1484 Thermal Conductivity 200 Specific Heat 0.63 Heat of Fusion 8.54 Heat of Vaporization 153.This is a SUPER easy guide on Calcium element. The standard SI unit is kilograms per cubic meter ( kg/m 3). In other words, the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance.
It is an intensive property, which is mathematically defined as mass divided by volume: Typical densities of various substances at atmospheric pressure.ĭensity is defined as the mass per unit volume. How does the atomic mass determine the density of materials? Density of Calcium The atomic mass number determines especially the atomic mass of atoms. The mass number is different for each different isotope of a chemical element. For 63Cu, the atomic mass is less than 63, so this must be the dominant factor. A nucleus with greater binding energy has lower total energy, and therefore a lower mass according to Einstein’s mass-energy equivalence relation E = mc 2. The nuclear binding energy varies between nuclei.This increases the mass of nuclei with more neutrons than protons relative to the atomic mass unit scale based on 12C with equal numbers of protons and neutrons. The neutron is slightly heavier than the proton.There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: For example, 63Cu (29 protons and 34 neutrons) has a mass number of 63, and an isotopic mass in its nuclear ground state is 62.91367 u. For other isotopes, the isotopic mass usually differs and is usually within 0.1 u of the mass number. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol.įor 12C, the atomic mass is exactly 12u, since the atomic mass unit is defined from it. One atomic mass unit is equal to 1.66 x 10 -24 grams. The unit of measure for mass is the atomic mass unit (amu). Therefore this resulting atomic mass is calculated from naturally-occurring isotopes and their abundance. Note that each element may contain more isotopes. How does the atomic number determine the chemical behavior of atoms? Atomic Mass of Calcium Since the number of electrons is responsible for the chemical behavior of atoms, the atomic number identifies the various chemical elements. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure.
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