Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
All atoms of an element have the same Select one: a. mass number b. atomic number c. number of isotopes d. number of neutrons Which particle is the least massive? Select one: a. proton b. electron c. nucleus d. neturon An electron is a particle with Select one: a. a negative charge, found in the nucleus. b. a positive charge, found in the nucleus. c. no charge, found outside the nucleus. d. a negative charge, found outside the nucleus. The number of neutrons in an atom equals the Select one: a. mass number minus atomic number. b. atomic number plus number of electrons. c. mass number plus atomic number. d. atomic number minus mass number. The atomic number of sulfur is 16. How many electrons are there in an atom of sulfur-34? Select one: a. 16 b. 34 c. 18 d. 50 What is the maximum number of electrons that can occupy the second energy level of an atom? Select one: a. 2 b. 8 c. 18 d. 32 Almost all the mass of an atom is located in its Select one: a. protons b. electrons c. electron cloud d. nucleus What is the mass number of oxygen-18? Select one: a. 8 b. 10 c. 16 d. 18 Which of the following is NOT true of electrons? Select one: a. electrons have a negative charge b. are found in energy levels outside the nucleus c. are only found in two energy levels d. have no mass Elements that have the same number of valence electrons are Select one: a. in the same period. b. in the same group. c. called noble gases. d. called transition metals. Copper is an example of Select one: a. an alkali metal. b. an alkaline earth metal. c. a nonmetal. d. a transition metal. How many periods does the periodic table have? Select one: a. 18 b. 7 c. 9 d. 8 Which group of the periodic table contains atoms with a stable outer electron configuration? Select one: a. 1 b. 2 c. 16 d. 18 An element that is shiny and conducts electric current is likely to be a Select one: a. gas. b. metal. c. metalloid. d. nonmetal. An element that is shiny and conducts electric current is likely to be a Select one: a. gas. b. metal. c. metalloid. d. nonmetal. How many valence electrons do atoms of oxygen and sulfur have? Select one: a. 2 b. 4 c. 8 d. 6 Which element would have the same number of valence electrons as fluorine? Select one: a. sulfur b. calcium c. bromine d. sodium Dot diagrams are used to represent _____. Select one: a. outer electons. b. the structure of the nucleus. c. isotopes. d. atomic number. Which statement best describes nonmetals? Select one: a. Nonmetals are good conductors of heat and electric current. b. Nonmetals are brittle solids. c. Nonmetals have properties opposite to those of metals. d. Nonmetals are located on the left side of the periodic table. Which list of elements contains only metalloids (semi-metals)? Select one: a. aluminum and gallium b. silicon and germanium c. phosphorus and arsenic d. gallium, germanium, and arsenic If an atom has an atomic number of 6 and a mass number of 14, how many electrons are in the atom? Select one: a. 8 b. 2 c. 4 d. 6
calculate the total number of state between the first energy level and the second energy level for a quantum well of
In a head-on collision, a car stops in 0.29 {s} from the speed of 28 {m/s}. The driver has a mass of 78 {kg}, and is, fortunately, tightly strapped into his seat. what force is applied to driver during that fraction of a second.
A small object begins a free-fall from a height of H = 87.0 m at t0 = 0 s. After %u03C4 = 2.20 s, At what height from the ground will the two objects first meet
A 60 kg barrel is lifted 2.0 m in the air using a pulley system with a mechanical advantage of 3. How much work does the person do lifting the barrel
two sources produce coherent light waves that come together at a detector located 6.50000 mm from one source and
The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.020 kg and is moving along the x axis with a velocity of +5.5 m/s. Find the final speed of puck A
Pierre Curie discovered through experiment that the magnetization of a paramagnetic material is directly proportional to the strength of an external magnetic field and inversely proportional to the temperature in degrees Kelvin
A scaffold that weighs 400 N supports two painters, one 500 N and the other 400 N. The reading in the left scale is 800 N. What is the reading in the right hand scale
The box is open at the top and has edge length L = 66 cm. Find out (a) the x coordinate, (b) the y coordinate, and (c) the z coordinate of the center of mass of the box.
A 6.4 centimeter diameter horizontal pipe gradually narrows to 4.9 centimeter. Evaluate what is the volume rate of flow
In a game of basketball, a forward makes a bounce pass to the center. What horizontal distance does the ball cover before bouncing
A parallel plate capacitor has a left plate with a positive charge of +Q and a right plate with a charge of -Q. The magnitude of the electric field between the plates is 100 V/m The plates each have an area of 2.0x10-3 m2 with a spacing of plate..
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd