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Flashcards do conjunto (17)
- 1CHAPTER 1KINETIC THEORY AND DIFFUSION
- 2draw changes of state
- 3what's the definition of diffusion?Movement of a fluid from an area of higher concentration to an area of lower concentration.
- 4draw atoms in a solid, liquid and gas
- 5whats happens when you heat particles?the particles in a solid vibrate, and the particles in a liquid or gas move faster.
- 6whats the difference between evaporation and boiling?In short it can be said that evaporation is a gradual vaporization of a liquid on the surface whereas boiling is a rapid vaporization of a liquid only when it is heated to its boiling point
- 7why is diffusion in liquids slower than in gases?Diffusion in liquids is slower than diffusion in gases because the particles in a liquid move more slowly. It happens faster if the temperature is increased.
- 8CHAPTER 2ATOMIC STRUCTURE
- 9What does covalent bond mean?A covalent bond,is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs.
- 10what is meant as a molecule?A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atom s that are held together by chemical bonds.
- 11what is ionic bonding?Positive and negative ions attract one another and bind together forming a new substance. This is called ionic bonding.
- 12why is diffusion in liquids slower than in gasesDiffusion in liquids is slower than diffusion in gases because the particles in a liquid move more slowly. It happens faster if the temperature is increased.
- 13whats an isotope?each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
- 14what does the nucleus contain?the nucleus contains both protons and neutrons
- 15what is meant by covalent bond in a molecule?A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms.
- 16what is meant by inter molecular forces?intermolecular forces are forces of attraction or repulsion which act between neighboring particles
- 17—
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- FlashCards sobre Sem título, criado por chayrbeiz em 25-05-2016.
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