Chemistry, asked by preranajangir5, 9 months ago

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atoms are the molecular masses

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Lesson 3 Atoms & Molecules

(1)An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.Components: Electrons and a compact nucleus of protons and neutrons

Components: Electrons and a compact nucleus of protons and neutronsElectric charge: zero (neutral), or ion charge

Components: Electrons and a compact nucleus of protons and neutronsElectric charge: zero (neutral), or ion chargeMass range: 1.67×10−27 to 4.52×10−25 kg

Components: Electrons and a compact nucleus of protons and neutronsElectric charge: zero (neutral), or ion chargeMass range: 1.67×10−27 to 4.52×10−25 kgDiameter range: 62 pm (He) to 520 pm (Cs) (data page)Here are some examples of atoms:

Here are some examples of atoms:Neon (Ne)

Here are some examples of atoms:Neon (Ne)Hydrogen (H)

Here are some examples of atoms:Neon (Ne)Hydrogen (H)Argon (Ar)

Here are some examples of atoms:Neon (Ne)Hydrogen (H)Argon (Ar)Iron (Fe)

Here are some examples of atoms:Neon (Ne)Hydrogen (H)Argon (Ar)Iron (Fe)Calcium (Ca)

Here are some examples of atoms:Neon (Ne)Hydrogen (H)Argon (Ar)Iron (Fe)Calcium (Ca)Deuterium, an isotope of hydrogen that has one proton and one neutron.

Here are some examples of atoms:Neon (Ne)Hydrogen (H)Argon (Ar)Iron (Fe)Calcium (Ca)Deuterium, an isotope of hydrogen that has one proton and one neutron.Plutonium (Pu)

Here are some examples of atoms:Neon (Ne)Hydrogen (H)Argon (Ar)Iron (Fe)Calcium (Ca)Deuterium, an isotope of hydrogen that has one proton and one neutron.Plutonium (Pu)F-, a fluorine anion.

(2)A molecule is a particle made up of two or more atoms that are chemically bonded together; the number of atomic nuclei making up a molecule is a determinate number. For example, HCl(g) is a molecule made of one hydrogen atom bonded to one chlorine atom. It is made of two atoms and is called a diatomic molecule.

(3)Postulates of Dalton's Atomic Theory

Postulates of Dalton's Atomic TheoryThe matter is made up of indivisible particles known as atoms. ... This can also be stated as all the atoms of an element have identical mass while the atoms of different elements have different masses. Atoms of different elements combine in fixed ratios to form compounds.

(4)Gaining electrons makes the atom negatively charged, and losing electrons makes the atom positively charged. Positive ions are called cations, and negative ions are called anions. For example, lithium loses 1 electron to become Li+1. The +1 indicates the ion has a +1 charge.Atoms are small. ... In fact, even the most powerful light-focusing microscopes can't visualise single atoms. What makes an object visible is the way it deflects visible light waves. Atoms are so much smaller than the wavelength of visible light that the two don't really interact.

(6)State two laws of chemical combination

State two laws of chemical combinationThere are five basic laws of chemical combination that govern the chemical combinations of elements:

State two laws of chemical combinationThere are five basic laws of chemical combination that govern the chemical combinations of elements:Law of Conservation of Mass. In simple terms, this law states that matter can neither be created nor destroyed. ...Law of Definite Proportions. ...

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