3 - Greene County ESC
... 6. Explain that the electric force between the nucleus and the electrons hold a atom together. Relate that on a larger scale, electric forces hold solid and liquid materials together (e.g., salt crystals and water). 7. Show how atoms may be bonded together by losing, gaining or sharing electrons and ...
... 6. Explain that the electric force between the nucleus and the electrons hold a atom together. Relate that on a larger scale, electric forces hold solid and liquid materials together (e.g., salt crystals and water). 7. Show how atoms may be bonded together by losing, gaining or sharing electrons and ...
Chapter 7 Ionic and Metallic Bonding
... In Chapter 6, we learned that noble gases are unreactive in chemical reactions In 1916, Gilbert Lewis used this fact to explain why atoms form certain kinds of ions and molecules The Octet Rule: in forming compounds, atoms tend to achieve a noble gas configuration; 8 in the outer level is stable ...
... In Chapter 6, we learned that noble gases are unreactive in chemical reactions In 1916, Gilbert Lewis used this fact to explain why atoms form certain kinds of ions and molecules The Octet Rule: in forming compounds, atoms tend to achieve a noble gas configuration; 8 in the outer level is stable ...
Notes on Atoms and Molecules
... the number of electrons present in the valence shell. Example: Sodium has one electron in its outermost shell, so the valency of sodium is 1. Calcium has two electrons in its outermost shell, so the valency of calcium is 2. If the outer shell has more than four electrons, the valency = 8 - the numbe ...
... the number of electrons present in the valence shell. Example: Sodium has one electron in its outermost shell, so the valency of sodium is 1. Calcium has two electrons in its outermost shell, so the valency of calcium is 2. If the outer shell has more than four electrons, the valency = 8 - the numbe ...
Chemical formula Chemistry Subscript Subscript
... subscripts; A way of describing the number of atoms Chemical formula that makes up one molecule of a compound ...
... subscripts; A way of describing the number of atoms Chemical formula that makes up one molecule of a compound ...
Electrical properties of solids
... valence band into the conduction band. These few electrons are sufficient to permit a limited amount of current to flow when an electric field is applied. Thus germanium and silicon have a resistivity intermediate between those of conductors and insulators and hence they are classified as semiconduc ...
... valence band into the conduction band. These few electrons are sufficient to permit a limited amount of current to flow when an electric field is applied. Thus germanium and silicon have a resistivity intermediate between those of conductors and insulators and hence they are classified as semiconduc ...
Ideas to Implementation by Jonathan Chan
... are held tightly and are not available to conduct electricity through the lattice. In some solids, the outer electrons are very loosely bound to particular atoms. These electrons can therefore move across the entirety of the solid. Metal lattices consist of an orderly array of positive metal ions pe ...
... are held tightly and are not available to conduct electricity through the lattice. In some solids, the outer electrons are very loosely bound to particular atoms. These electrons can therefore move across the entirety of the solid. Metal lattices consist of an orderly array of positive metal ions pe ...
Week 3 - Help-A-Bull
... Kinetic Molecular Theory What is it? What do we need it for? • Links the “macroscopic” properties of gases and solids to the kinetic energy of atoms/molecules; • Explains the pressure of gases … heat capacity of metals … average speed of electrons in semiconductors etc. • Assumes that atoms/molecul ...
... Kinetic Molecular Theory What is it? What do we need it for? • Links the “macroscopic” properties of gases and solids to the kinetic energy of atoms/molecules; • Explains the pressure of gases … heat capacity of metals … average speed of electrons in semiconductors etc. • Assumes that atoms/molecul ...
міністерство освіти і науки україни
... atom has only a few electrons in a shell, it will tend to lose them to empty the shell. These elements are metals. When metal atoms bond, a metallic bond occurs. When an atom has a nearly full electron shell, it will try to find electrons from another atom so that it can fill its outer shell. These ...
... atom has only a few electrons in a shell, it will tend to lose them to empty the shell. These elements are metals. When metal atoms bond, a metallic bond occurs. When an atom has a nearly full electron shell, it will try to find electrons from another atom so that it can fill its outer shell. These ...
homework
... learning for you. Accept the responsibility for your learning. The following set of specific suggestions, if followed faithfully, will help you to derive the maximum benefit from this course: 1. Budget your time so that you will not feel rushed as you study. For a 2 credit hour course, you should ex ...
... learning for you. Accept the responsibility for your learning. The following set of specific suggestions, if followed faithfully, will help you to derive the maximum benefit from this course: 1. Budget your time so that you will not feel rushed as you study. For a 2 credit hour course, you should ex ...
Semiconductors - Material Science
... The absence of an electron creates the effect of a positive charge, hence the name P-type. Holes can conduct current. A hole happily accepts an electron from a neighbor, moving the hole over a space. P-type silicon is a good conductor. ...
... The absence of an electron creates the effect of a positive charge, hence the name P-type. Holes can conduct current. A hole happily accepts an electron from a neighbor, moving the hole over a space. P-type silicon is a good conductor. ...
Unit chemical bonds
... between elements than covalent bonds – Are easier to break into ions • But strong bonds b/w molecules – Substances tend to be solids at Room Temp – Have high melting ...
... between elements than covalent bonds – Are easier to break into ions • But strong bonds b/w molecules – Substances tend to be solids at Room Temp – Have high melting ...
atomic theory - unit a
... 2.3 ATOM: smallest particle of an element that retains the chemical identity of the element (John Dalton). • Atomic size: 0.1 - 0.5 nm • 1981 - STM (scanning tunneling microscope) used to "see" atoms Dalton's Atomic Theory - 1808 1) Each element is composed of small particles called atoms. 2) All at ...
... 2.3 ATOM: smallest particle of an element that retains the chemical identity of the element (John Dalton). • Atomic size: 0.1 - 0.5 nm • 1981 - STM (scanning tunneling microscope) used to "see" atoms Dalton's Atomic Theory - 1808 1) Each element is composed of small particles called atoms. 2) All at ...
Solid
Solid is one of the four fundamental states of matter (the others being liquid, gas, and plasma). It is characterized by structural rigidity and resistance to changes of shape or volume. Unlike a liquid, a solid object does not flow to take on the shape of its container, nor does it expand to fill the entire volume available to it like a gas does. The atoms in a solid are tightly bound to each other, either in a regular geometric lattice (crystalline solids, which include metals and ordinary ice) or irregularly (an amorphous solid such as common window glass).The branch of physics that deals with solids is called solid-state physics, and is the main branch of condensed matter physics (which also includes liquids). Materials science is primarily concerned with the physical and chemical properties of solids. Solid-state chemistry is especially concerned with the synthesis of novel materials, as well as the science of identification and chemical composition.