Table of Contents
What element is an alkaline earth metal with a mass of 88?
#88 – Radium – Ra. It is the heaviest of the alkaline earth metals. It is extremely radioactive. It resembles barium in chemical behavior.
Which of the following is an alkaline earth metal?
Group 2A — The Alkaline Earth Metals. Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
What are alkaline earth metals 3 examples?
The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Why is Group 2A alkaline earth metals?
Alkaline earth metals are group 2A, and they have two valence electrons. So calcium and strontium both have two valence electrons. Because they are so reactive, you can’t find alkaline earth metals in their pure form in nature.
What is 89 on the periodic table?
Actinium
Actinium gives its name to a block of fifteen elements that lie between actinium and lawrencium in the periodic table with atomic numbers 89 through 103.
What is number 88 on the periodic table?
Radium
Radium is a chemical element with the symbol Ra and atomic number 88….
| Radium | |
|---|---|
| Atomic number (Z) | 88 |
| Group | group 2 (alkaline earth metals) |
| Period | period 7 |
| Block | s-block |
How do you identify an alkaline earth metal?
The alkaline earth metals are shiny, silvery-white, and somewhat reactive metals at standard temperature and pressure. All the alkaline earth metals readily lose their two outermost electrons to form cations with a 2+ charge.
What is meant by alkali metal?
alkali metal, any of the six chemical elements that make up Group 1 (Ia) of the periodic table—namely, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids).
What are alkaline earth metals give an example?
alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Where can you find alkaline metals on earth?
The most abundant of the alkaline earth metals on Earth is calcium which is the fifth most abundant element in the Earth’s crust.
What is Group 3A called?
Lr. Group 3A (or IIIA) of the periodic table includes the metalloid boron (B), as well as the metals aluminum (Al), gallium (Ga), indium (In), and thallium (Tl). Boron forms mostly covalent bonds, while the other elements in Group 3A form mostly ionic bonds.
What is the name for the group number 7A or 17?
Group 7A (or VIIA) of the periodic table are the halogens: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The name “halogen” means “salt former”, derived from the Greek words halo- (“salt”) and -gen (“formation”).
How many protons are in an alkaline earth metal?
Symbol: Ca. Atomic Number: 20. Atomic Mass: 40.07. Number of Protons/Electrons: 20. Number of Neutrons: 20. Classification: Alkaline Earth Metals. Discovery: 1808.
Which is an alkaline earth metal in Group 2?
Radium (atomic number 88) has similar properties to barium and is also in the Group 2 category. However, radium is a radioactive element and is generally under the category of radioisotopes in addition to being an alkaline earth metal, because it is not a stable element. The Group 2 elements tend to be less reactive than their Group 1 counterparts.
Is the element radium an alkaline earth metal?
However, radium is a radioactive element and is generally under the category of radioisotopes in addition to being an alkaline earth metal, because it is not a stable element. The Group 2 elements tend to be less reactive than their Group 1 counterparts.
Which is an element with an atomic number of 88?
Radium is a chemical element with symbol Ra and atomic number 88. Which of the following element is an alkaline earth metal? Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).