Chemistry : The Structure And Properties Of Chemistry

Concept 2.1 Matter consists of chemical elements in pure form and in combinations called compounds

12. Briefly define the following: Matter is anything that takes up space. Element is any substance that can’t be broken down into substances with different properties. Atom is the smallest part of an element that displays the properties of the element.

One of these properties is called an electrical charge. Protons have a "positive" (+) charge, electrons have a "negative" (-) charge, and neutrons have no charge, they are neutral.

In the nucleus of an atom there are protons and neutrons the number of protons and neutrons depends on the element and ,if it is an isotope of that element. E.g. carbon 12, carbon 12 has six neutrons six protons and 6 electrons . Electrons are located around the nucleus of the atom. Electrons are in shells, the shell closest to the nucleus is 1 , the one after 2 and so on. Each shell can only hold up to a certain number of electrons . the first can hold up to 2 , the second 8 (2+6) the third up to 18 (2+6+10). The general formula for finding out how many electrons a shell can hold is 2n^2. Electrons have a negative charge , while protons have a positive and neutrons have no charge. A atom has the same number of protons and electrons. An ion is formed when an atom loses or gains a electrons .

6. The mass number is equal to an atom’s number of protons and neutrons added together.

(OI) According to the chart, protons have a positive charge, neutrons have no charge, and electrons have a negative charge. (Doc 3) Each atom have a nucleus, where the protons and neutrons

into the blood. Doctors would measure the amount of tracer that is found in the urine of their patient in order to diagnose them. Which is the only subatomic particle that is directly involved in the chemical reactions between atoms? The only subatomic particle that is directly involved is an electron. What is potential energy? Potential energy is energy that matter has due to its location or structure. Explain which has more potential energy in each pair: boy at the top of a slide/boy at the bottom Boy at top of a slide because of his location. electron in the first energy shell/electron in the third energy shell Electron in third energy shell because of its relative distance from the nucleus water/glucose Glucose because of its structure (glucose has more chemical bonds) What determines the chemical behavior of an atom? The distribution of electrons in the electron shells determines the chemical behavior of an atom. For sodium: How many valence electrons does it have? 1 valence electron How many protons does it have? 11 protons Section 3 15. Define molecule. A molecule is formed by two or more atoms held together by a covalent bond. 16. Now, refer back to your definition of a compound and fill in the following chart: Molecule? Compound? Molecular Formula Structural Formula (y/n) (y/n) Water Yes Yes H2O H - O - H Carbon Dioxide Yes Yes CO2 O = C = O Methane Yes Yes CH4 Oxygen Yes No O2 O = O What type of bond is seen in O2? Explain what this means. A double covalent bond is

2. An isotope is like a different version of an original atom. It has the same number of protons but the neutrons change. As a result, the atomic number remains the same but the mass number changes.

Chemistry is the study of the composition, behaviour and properties of matter, and of the elements of the Earth and its atmosphere.

Isotopes are essential to the universe in a chemical and even a social aspect, standing as a variation of an element portrayed as unique. Important questions surround isotopes, how are they distinctive and ultimately what is an isotope? To answer that question, isotopes are a form of an element that differs in the number of neutrons in the nucleus but does not differ in protons of that element. An isotope in particular that contributed to society is Plutonium-238, which is understood to be a radioactive isotope.

The main component that make up an atom are protons, electrons and neutrons. Protons are positively charged. While electrons are negatively charged. Neutron is not like a proton or an electron. It isn't like proton or an electron because a neutron does not have a charge. They are arranged by the atomic number. The atomic number is the number of protons in the nucleus of an atom and the electrons are arranged in levels. The atomic number is the small number that is at the top left corner of the element in the box. Copper has twenty nine electrons and twenty nine protons. Copper has two isotopes. Which are copper 63 and copper 65. Their compositions of copper 63 and 65 are stable. The abundances of copper 63 is 69.15 percent and copper 65 is

The atoms of each element possess a unique electron configuration because of the fact that different elements have different numbers of electrons. The ground state electron configuration shows both the lowest and most stable position for each element. There are three basic rules used for determining the ground-state electron configurations.

There are five main braches of chemistry: Organic Chemistry, Inorganic Chemistry, Analytical Chemistry, Physical Chemistry, and Biochemistry. Organic chemistry and Inorganic chemistry are self-explanatory, as organic chemistry is concerned with the chemistry side of carbon and living things, and inorganic chemistry is the branch of chemistry that deals with the interaction between and structure in inorganic compounds.

An Atom is the the basic building block of all matter. Atoms are made up of Particles, called: Protons, neutrons and Electrons. Protons carry a positive charge, the neutron carry 's a neutral charge and the electron carry’s a negative charge. The Atom has two main parts the Nucleus and the Electron Shell. The Nucleus contains the Protons and Neutrons. The electron Shell Contains the The electrons.

Chemistry has been called the science of what things are. Its intent is the exploration of the nature of the materials that fabricate our physical environment, why they hold the different properties that depict them, how their atomic structure may be fathomed, and how they may be manipulated and changed.