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Definition of Concentrate
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The Composition of Atoms Quick Check questions and answers Science 8 A Unit 3: Matter Interactions A. A model of an atom shows eight electrons in rings that represent different energy levels. How many electrons are in each energy level? 1. four in the
Which element would have a full outer shell of electrons if it gained three electrons? boron lithium nitrogen argon THIS ONE Which statement best explains why hydrogen's atomic number is equal to its mass? hydrogen is in the first row and the first column
How are glossaries different from dictionaries? Glossaries contain only the words used in a particular book. Glossaries provide synonyms and antonyms for all words. Glossaries only contain the pronunciations of words. Glossaries provide definitions for all
A neutron, a proton, and an electron are initially at the same distance from a relatively large stationary nucleus moving at a constant velocity. Assume the masses of the proton and neutron are equal. 1. Which is the first particle to reach the nucleus? 2.
5. Which statement accurately describes the atoms of a specific element? A zinc‚ Zn‚ atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus. A scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons
Neutron stars are composed of solid nuclear matter, primarily neutrons. Assume the radius of a neutron is approx. 1.0 x 10^-13 cm. Calculate the density of a neutron. [Hint: For a sphere V=(4/3) pi r^3. Assuming that a neutron star has the same density as
An electron is excited from the n=1 ground state to the n=3 state in a hydrogen atom. Which of the following statements are true? Correct the false statements to make them true. A. It takes more energy to ionize (completely remove) the electron from n=3
A hydrogen atom is in its third excited state (n=4). Using Bohr theory of the atom calculate (a) the radius of the orbit, (b) the linear momentum of the electron, (c) the angular momentum of the electron (d) the kinetic energy (e) the potential energy, and
Which statement describes the principal quantum number (n)? A. The quantum number that indicates the subshell occupied by an electron B. The quantum number that indicates the energy level of the electron C. A subdivision of an energy level in an atom D.
How is the light emitted by an atom related to its electron configuration? A Light is produced when an electron moves from a higher to a lower energy level. The color of the light (as we see it) depends on the amount of energy emitted by the electron. B