Please complete this assessment on your own. Answer each item by clicking on the correct choice, then go on to the next item.

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1 Assessment Building Blocks of Matter Instructions Please complete this assessment on your own. Answer each item by clicking on the correct choice, then go on to the next item. 1) Protons, neutrons, and electrons are subatomic particles in an. A) element B) isotope C) mineral D) atom 2) Beryllium, magnesium, and calcium are all located in group 2 of the periodic table. What else do these elements have in common? A) They all have the same atomic weight. B) They are all radioactive. C) They are Noble gases. D) They are metals. 3) Which element is located in group 1 on the periodic table? A) K B) He C) B D) Be 4) Neutrons are called subatomic particles because they have no charge. A) neutral B) negative C) positive D) optional 5) Based on its location on the periodic table, which of the following elements is classified as a metal? A) nitrogen B) carbon C) sulfur D) sodium 6) The building blocks of matter are. A) electrons B) atoms C) air

2 D) water 7) In an atom, where are electrons found? A) next to the protons in the nucleus B) orbiting in shells that are out away from the nucleus C) orbiting in shells that are very close to the center of the atom D) next to the neutrons in the nucleus 8) An element's number on the periodic table is equal to. A) its number of protons B) its atomic mass C) its number of protons and neutrons D) its number of neutrons 9) Each element has unique. A) mass B) color C) atoms D) charge 10) The electrically neutral subatomic particle in the nucleus of an atom is the. A) proton B) nucleus C) neutron D) electron 11) Atomic number on the periodic table refers to. A) the number of ways an element can be combined with other elements B) the number of protons in each atom of an element C) the number of atoms in a cubic centimeter of an element D) the number of neutrons added to the number of protons found in an atom of an element 12) The order of the elements in the periodic table is based on the. A) number of protons in an atom of the element B) number of neutrons in an atom of each element C) number of electrons in an atom of each element D) the order in which they were discovered 13) The number of electrons in a neutral atom is equal to the number of.

3 A) quarks B) neutrons C) levels of energy D) protons 14) The nucleus contains both neutrons and positively charged particles called. A) protons B) electrons C) neutrons D) ions 15) The atomic weight of the atom is composed of the protons and neutrons in the.

4 A) orbits B) nucleus C) outer energy level D) innermost energy level 16) Which particle has a mass of 1 amu and a positive charge? A) protons B) neutrons C) electrons D) helium 17) Two different subatomic particles are found in the of an atom. A) outermost energy level B) innermost energy level C) nucleus D) electron shell 18) The atomic mass of an element. A) is the combined mass of its protons B) is the combined mass of its neutrons C) is the combined mass of its protons and electrons D) is the combined mass of its electrons, neutrons, and protons 19) The periodic table is organized so chemists can easily see. A) the color of each element B) the importance of each element C) the atomic number and weight of each element D) the smell and taste of each element 20) Which of the following cannot be seen by the naked eye?

5 A) elements B) atoms C) compounds D) mixtures 21) What particles are found in the nucleus of an atom? A) protons and electrons B) protons and neutrons C) neutrons and electrons D) only protons 22) The periodic table is arranged by atomic number, which is the number of in an atom.

6 A) protons B) electrons C) neutrons D) ions 23) The periodic table. A) arranges the elements in alphabetical order B) arranges the elements in the order in which they were discovered C) arranges the elements based on common physical properties and how they react with each other D) arranges the elements in the order of their melting points 24) Atoms are extremely small particles made of neutrally charged subatomic particles called A) ions B) neutrons C) protons D) electrons 25) The atomic weight of an atom is mostly the mass of its. A) protons

7 B) protons and electrons C) protons and neutrons D) electrons 26) Which is made of only one kind of atom and cannot be broken down into a simpler substance? A) an element B) a compound C) a colloid D) a mixture 27) Atoms are composed of. A) elements B) molecules C) subatomic particles D) ions 28) The atoms of any element have a unique number of. A) neutrons B) protons C) nuclei D) electrons 29) Which of the following characteristics can be used to identify an element? A) mass B) volume C) melting point D) temperature 30) Which of these best describes the mass number of an element? A) electrons B) protons and neutrons C) all energy levels D) outer energy level 31) The horizontal rows in the periodic table are arranged according to the number of electrons in the atom's outer shell. What are these rows called? A) columns B) anions C) cations D) periods

8 32) The smallest particle of an element that has the properties of that element is the. A) ion B) molecule C) atom D) isotope 33) What is the atomic mass of an atom with 5 protons, 5 neutrons, and 5 electrons? A) 15 B) 10 C) 5 D) 25 34) The noble gases helium, neon, argon, and krypton are all located in group 18 of the periodic table. What can you predict about these elements, based on their group? A) These elements react with many non-metals to form electrolytes. B) These elements are unstable and will easily react with metals to form rust. C) These elements are very common in the atmosphere. D) These elements are so stable they do not easily react with anything. 35) What is the electrical charge on a proton? A) ionic B) positive C) negative D) neutral 36) The mass number of an atom is the number of protons plus the number of. A) neutrons B) positrons C) electrons D) protons 37) The atomic number is the number of in the nucleus of an atom. A) electrons B) neutrons C) ions D) protons

9 38) Every element in the periodic table. A) is the same size B) has a set of unique characteristics C) combines easily with the other elements D) is solid at room temperature 39) An element is composed of only one type of. A) compound B) atomic charge C) molecule D) atom 40) On the periodic table, an element's atomic number is the number of in its nucleus. A) electrons B) protons C) neutrons D) isotopes