Characteristics of elements worksheet answers

Which element is a metal BA 56 or at 85?

Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal.

What period are the following elements in GE?

Period 4

Fact box

Group	14	Melting point
Period	4	Boiling point
Block	p	Density (g cm⁻³)
Atomic number	32	Relative atomic mass
State at 20°C	Solid	Key isotopes

Which element is a metal BA or at?

Barium is a chemical element with symbol Ba and atomic number 56. Classified as an alkaline earth metal, Barium is a solid at room temperature.
…
Barium.

Atomic Mass	137.33u
Electron Configuration	[Xe]6s²
Oxidation States	+2
Year Discovered	1808

Which element has 5 valence electrons B 5 or P 15?

Phosphorus has five valence electrons in its valence shell. The atomic number of phosphorus is 15.

Which of these would best describe the structural difference between magnesium and aluminum?

Which of these would BEST describe the structural difference between magnesium and aluminum? Magnesium has one less proton than aluminum.

How many elements are present in each of the following HF and HF?

Ans. a) HF contains two elements that is Hydrogen (H), and Fluorine (F), while in Hf there is one element that is Hafnium (Hf).

Which group is also called halogens?

Group 7A

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”).

Which block is nitrogen?

p-block

Nitrogen
Group	group 15 (pnictogens)
Period	period 2
Block	p-block
Electron configuration	[He] 2s² 2p³

What are group 6 elements called?

Lr. Group 6A (or VIA) of the periodic table are the chalcogens: the nonmetals oxygen (O), sulfur (S), and selenium (Se), the metalloid tellurium (Te), and the metal polonium (Po). The name “chalcogen” means “ore former,” derived from the Greek words chalcos (“ore”) and -gen (“formation”).

What is period 5 on the periodic table?

Answer: The period 5 transition metals are yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), and cadmium (Cd).

What period is I in the periodic table?

Period 1 element

Hydrogen
Sodium	Magnesium	Chlorine
Potassium	Calcium	Bromine
Rubidium	Strontium	Iodine
Caesium	Barium	Astatine

What is the electron configuration for germanium Ge )?

[Ar] 3d¹⁰ 4s² 4p²

Germanium / Electron configuration

What period are the following elements in bromine?

Fact box

Group	17	−7.2°C, 19°F, 266 K
Period	4	58.8°C, 137.8°F, 332 K
Block	p	3.1028
Atomic number	35	79.904
State at 20°C	Liquid	⁷⁹Br

What is the basic element of life?

Abstract. The four basic elements of life are: Oxygen, hydrogen, nitrogen and phosphorus. These four elements are found in abundance in both the human body and in animals. There are other elements that compose the human body, but the four we’ve highlighted participate in all life processes.

How many elements are there?

118 elements

At present, 118 elements are known to us. All these have different properties. Out of these 118, only 94 are naturally occurring.

What is the importance of elements?

Elements are essential units that are the basic constituents of all living and non-living beings. They are the core of the universe. Every tiny or huge particle comprises of elements. Our body is built up of five major elements: Carbon, Hydrogen, Oxygen, Nitrogen and calcium.

What is the use of elements?

	ELEMENT	USES
1)	Aluminum	A light metal used in making airplanes, buildings, pots & pans, etc.
2)	Bromine	Used in photography, medicines, insecticides, etc.
3)	Calcium	A soft, metallic chemical element found in limestone, marble, chalk, etc.
4)	Carbon	Found in coal, oil gas, living things, & inks

Why are elements important to life?

A large fraction of the chemical elements that occur naturally on the earth’s surface are essential to the structure and metabolism of living things. Four of these elements (hydrogen, carbon, nitrogen, and oxygen) are essential to every living thing and collectively make up 99% of the mass of protoplasm.

Which element is most important and why?

Carbon is the most important element to life. Without this element, life as we know it would not exist. As yo u will see , carbon is the central element in compounds necessary for life.

What are major elements?

Major elements are elements that constitute more than 1 percent of the coal by weight: carbon, hydrogen, oxygen, nitrogen, and sulfur. The relative percentage of carbon increases with rank, whereas the percentages of oxygen and hydrogen decrease with rank.