Table of Contents
- 1 What is the criteria for placing elements in the periodic table?
- 2 How can properties be used to identify elements?
- 3 How did the elements get their symbols?
- 4 How do we determine which element an atom is?
- 5 What do groups on the periodic table show?
- 6 Which of the following element groups are considered types of metals?
What is the criteria for placing elements in the periodic table?
The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups. Elements in the same group have similar chemical properties.
How can properties be used to identify elements?
Identifying Elements : Example Question #5 There are two properties that can be used to identify an element: the atomic number or the number of protons in an atom. The number of neutrons and number of electrons are frequently equal to the number of protons, but can vary depending on the atom in question.
How did the elements get their symbols?
chemical symbol, short notation derived from the scientific name of a chemical element—e.g., S for sulfur and Si for silicon. Sometimes the symbol is derived from the Latin name—e.g., Au for aurum, gold, and Na for natrium, sodium.
How many elements start with a different letter than their symbol?
National Institute of Standards and Technology (NIST). There are eleven elements represented in the periodic table by letters not in line with their names: Sodium (Na – Natrium) Potassium (K – Kalium)
How does the periodic table of elements work?
The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.
How do we determine which element an atom is?
Atomic Number and Mass The number of protons determines an element’s atomic number and is used to distinguish one element from another. The number of neutrons is variable, resulting in isotopes, which are different forms of the same atom that vary only in the number of neutrons they possess.
What do groups on the periodic table show?
valence electrons
The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups. The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity. Created by Sal Khan.
Which of the following element groups are considered types of metals?
Most elements are metals. This group includes alkali metals, alkaline earth metals, transition metals, basic metals, lanthanides (rare earth elements), and actinides. Although separate on the periodic table, lanthanides and actinides are really specific types of transition metals.