The Atom & The Periodic Table 30 Question Review!!!

Answer the following questions: A neutral atom contains 7 protons. How many electrons does it have? ___ A theoretical ion contains 9 protons and a charge of 2-. How many electrons does it have? _______________ A theoretical ion contains 12 protons and a charge of 3+. How many electrons does it have? _______________ An atom contains 4 protons and 3 neutrons. What is the approximate atomic mass?________________ An atom has an atomic mass of 14 and 8 protons. How many neutrons does it contain? __________________

An theoretical atom has a neutron number of 23 and an atomic mass of 11. How many protons does it contain? ________________ A theoretical atom has an atomic mass of 28 and 15 protons. How many neutrons does it have? ___________________ One atom has an atomic mass of 21 and another has an atomic mass of 19. Can they be the same element? ______________________________________ An ion has a charge of 2+ and an atomic mass of approximately 24. Which element is this? ______________________. How many protons does it contain? ____. How many neutrons does it contain? ______________________. How many electrons does it contain?

In the late 1860s, ________________ was the first to organize the elements. He put them in order of increasing ______________ _________. Today, the periodic table is organized in order of increasing ______________ __________. Along with the name, symbol, atomic number, and atomic mass, _______ ____________ is also included in most periodic tables. This is the charge an atom gets when it becomes an ________. In the periodic table, most of the elements that have atomic numbers less than 93 are _________________. The other elements are ____________________ (man- made). Elements on the left side of the periodic table (except hydrogen) are _________________. Elements on the right side of the periodic table are ______________________. The elements that form a diagonal between the other two types are ____________________.

State at Room Temperature (20°C) Malleability and Ductility 15. Complete the following table. Material State at Room Temperature (20°C) Appearance Conductivity Malleability and Ductility Metals Non-Metals Metalloids

A horizontal row in a periodic table is called a _____________________ A horizontal row in a periodic table is called a _____________________. They are numbered from 1 to 7, moving __________________. A vertical column in a periodic table is called a _______________ or ________________.They are numbered from 1 to 18, from _____________ to ______________. Many of the properties of elements are determined by the arrangement of _____________ ___________. Atoms within the same __________ in the periodic table have the same number of _____________ _______________. During a chemical reaction, one atom can join with another atom by _____________, ______________, or ___________________ valence electrons. Nobel gases have the _______________ number of electrons in their outer ______________ ____________. Therefore, they are very chemically _______________, and do not _______________ easily with other elements.

Which is more reactive – Nitrogen or Oxygen? _________________ Atoms of elements other than noble gases can achieve a full outer energy level, and therefore, more ________________, by ______________, _______________, or ____________________ electrons. In general, the closer that an element is to a ______________ ___________ (either to the left or right), the more ________________ the element is. This is because these atoms are closer to having a ____________ _______ of valence electrons. How many electrons must a chlorine atom ________ in order to have a full valence shell? ___ How many electrons must a Calcium atom _______ in order to have a full valence shell? ___ Which is more reactive – Nitrogen or Oxygen? _________________ Which is more reactive – Potassium or Calcium? __________________

As you move down a group, the size of atoms ______________ As you move down a group, the size of atoms ______________. This is because ________________ ______________ occupy higher and higher energy levels. As you move down a group in the periodic table, the reactivity of atoms _____________. The farther the valence electrons are from the nucleus, the more easily they can be __________ and, therefore, the more _____________ the element is. As you move from left to right across a period, the size of atoms __________________. This is because the number of ______________ increases as the number of energy levels stays the same. The increased number of ___________________ attracts the ____________________, pulling them __________________ to the _________________.