Flashcards
NBCS - Atomic Chemistry
Cards in this deck (17)
- 1What is an atom?An atom is the smallest constituent unit of ordinary matter that constitutes a chemical element.
- 2What is the structure of an atom?
- 3How do you write an atomic symbol?
- 4How is the periodic table structured?
- 5How are the elements categorised?The elements can be broadly categorised into metals, non-metals and metalloids.
Subcategories include, Alkali Metals, Alkaline-earth metals, Lanthanides, Actinides, Transition metals, Post-transition metals, Metalloids, Nonmetals, Halogens, Noble gases - 6What does atomic number have to do with their arrangement on the periodic table?In the modern periodic table, the elements are listed in order of increasing atomic number.
- 7What is the difference between an Isotope and electrically neutral atom?Isotopes are elements with different masses.
Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses. - 8What is an example of an isotope?carbon-12, carbon-13, and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13, and 14, respectively.
- 9What are radioisotopes?A radioactive isotope.
They can also be defined as atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus. - 10What is radioactivity?The emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
- 11What is radioactive decay?Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation.
- 12What is Alpha radiation?Alpha radiation is another name for the alpha particles emitted in the type of radioactive decay called alpha decay. Alpha particles are helium-4 (4He) nuclei.
- 13What is Beta radiation?Beta particles are high energy, high-speed electrons or positrons that are ejected from the nucleus by some radionuclides during a form of radioactive decay called beta-decay. Beta-decay normally occurs in nuclei that have too many neutrons to achieve stability.
- 14What is Gamma radiation?A gamma-ray is a packet of electromagnetic energy (photon) emitted by the nucleus of some radionuclides following radioactive decay.
- 15What is half-life?Half-life is the time required for a quantity to reduce to half of its initial value.
- 16How is radiation used in medicine?The most well known is using x rays to see whether bones are broken. X-rays, gamma rays, and other forms of ionizing radiation offer an effective way to treat certain kinds of cancer.
- 17What are some industrial uses for radiation?Material density evaluation, product sterilisation, quality control, static elimination, and electricity generation.
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- Year 10 Sciences Flashcards on NBCS - Atomic Chemistry , created by India Fletcher on 02/09/2019.
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- India Fletcher
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