The Mitochondrion The cell is the most basic unit of life. The cell serves as the place for processes such as cellular respiration‚ metabolism and energy production in the form of ATP‚ or adenosine triphosphate. Many organelles—small structures that help to carry out the daily operations of the cell‚ inhabit the cell such as the Golgi complex‚ the endoplasmic reticulum‚ the nucleus‚ or brain of the cell‚ and lysosomes. An organelle that is the place where most of the cell’s energy is generated is
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Atomic Masses of atoms & molecules Mass number & atomic number Atomic structure (neutrons‚ protons & electrons) Mole concept & conversion Avogadro’s concept Empirical & molecular formulae Isotopes FHSC1114 Physical Chemistry Centre for Foundation Studies‚ UTAR Objectives To define relative atomic masses of atoms & molecules To define & determine mass no. & atomic no. To determine no. of neutrons‚ protons & electrons To understand mole concept & Avogadro’s concept To determine the empirical
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Review Questions Exam 2 Although I try to cover all materials thoroughly in these questions‚ anything covered in lecture may appear on the exam. Membrane Transport 1. Describe the cell permeability and membrane transport. What can enter/exit the cell on its own? What requires assistance? Why? 2. Describe membrane potential. What is it? How is it established? How does it influence the transport of charged molecules? What are the components of the electrochemical gradient?
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milli- 0.000‚000‚000‚001 0.000‚000‚001 0.001 centi- 0.01 deci- 0.1 deka- 10 hecto- 100 Kilo- 1‚000 Mega 1 kcal = 1000 cal 1 Cal= 1 kcal 1 cal = 4.184 1‚000‚000 • Neutral atoms contain the same number of electrons and protons. • Components of a mixture can be separated (purified) by physical means. • Physical changes alter a substance without any changes to the chemical composition. • Chemical change involves breaking down a substance into other substances. • Chemical
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Self-assessment practice tests Test 1 – Material from Chapters 2–4 | 45 minutes 1 The kinetic theory suggests different arrangements for the atoms or molecules in the three states of matter. The diagrams below show how evidence suggests the particles are arranged in the three states of matter. 1 2 3 What are the three states shown? 1 A B C D 2 gas liquid solid liquid 2 liquid gas liquid solid 3 solid solid gas gas The graph shows the heating curve for a metal that is solid at room temperature (25
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The PERusahaan Otomobil KeDUA Sendirian Berhad‚ is Malaysia’s second largest automobile manufacturer after Proton. It was established in 1992 and launched their first car‚ the Perodua Kancil in August 1994.The shareholders of Perodua are UMW Corporation Sdn Bhd with 38% stake‚ Daihatsu Motor Co. Ltd. (20%)‚ MBM Resources Bhd (20%)‚ PNB Equity Resources Corporation Sdn Bhd (10%)‚ Mitsui & Co. Ltd (7%) and Daihatsu (Malaysia) Sdn Bhd (5%). The company started operations in 1994 and the ever so popular
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Matter: anything that has mass and takes up space Particle Theory: the scientific statements that summarize about particles of matter 1. All matter is made up of particles that contain spaces between each particle 2. Different substances are made up of different types of particles 3. Particles are always in constant motion 4. The movement of particles will increase if temperature rises 5. Particles are attracted to each other Pure substance: a substance that consists of only 1 type of particle
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combine in simple whole-number ratios to form compounds (see below)‚ in a chemical reaction‚ atoms are separated‚ combined‚ or rearranged. Whole-number ratios: No halfsies. But he was wrong about atoms being indivisible (that’s how we know about protons and neutrons and electrons and the other subatomic particles). And how atoms of the same element have identical properties: atoms of an element may have slightly different masses‚ e.g: ISOTOPES. You can see an atom using the scanning tunneling
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the history of Perusahaan Otomobil Nasional Berhad (PROTON). It is the national car project whose brainchild was none other than the Prime Minister Dr Mahathir himself. Prior to the incorporation of PROTON on 7 May 1983‚ the industry comprises mainly of assemblers of foreign cars such as Tan Chong Motors‚ the assembler for completely knock down (CKD) Nissan cars and Kah Motors‚ the assembler for CKD Honda cars. Since the inception of PROTON and subsequently PERODUA‚ the country second national
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particles called protons‚ electrons‚ and neutrons. Protons carry a positive electrical charge‚ electrons carry a negative electrical charge‚ and neutrons carry no electrical charge at all. The protons and neutrons come together in the central part of the atom‚ called the nucleus‚ and the electrons ’orbit’ the nucleus in the electron cloud. An element is a substance that is made entirely from one type of atom. For example‚ the element hydrogen is made from atoms containing a single proton and a single
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