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What are the chemical properties of iodine?

What are the chemical properties of iodine?

Chemical properties of iodine – Health effects of iodine – Environmental effects of iodine

Atomic number 53
Electronegativity according to Pauling 2.5
Density 4.93 at 20°C
Melting point 114 °C
Boiling point 184 °C

What are two physical properties of iodine?

The Physical Properties of Iodine are as follows:

  • Color : Violet black. A sgray solid that changes into purple vapors when heated.
  • Luster : Has a shine or glow.
  • Odor : Strong, harsh odor.
  • Crystalline structure : Rhombic.
  • Density : Heavy.

What are chemical properties of alkali metals?

The alkali metals are a group of chemical elements in the periodic table with the following physical and chemical properties:

  • shiny.
  • soft.
  • silvery.
  • highly reactive at standard temperature and pressure.
  • readily lose their outermost electron to form cations with a charge of +1.

What is the chemical properties of metal?

Metals are lustrous, malleable, ductile, good conductors of heat and electricity. Other properties include: State: Metals are solids at room temperature with the exception of mercury, which is liquid at room temperature (Gallium is liquid on hot days).

What qualifies as a group?

(Entry 1 of 2) 1 : two or more figures forming a complete unit in a composition went there as a group. 2a : a number of individuals assembled together or having some unifying relationship a study group. b : an assemblage of objects regarded as a unit one of the food groups.

What are groups of 3 called?

Other names for a group of three include trio, derived from Italian, and triad. Three months is called a trimester, and a triennium measures three years. A triplet describes three usually identical items, and triple describes three ordered elements.

What is a group size?

Group size is the number of individuals within a group; Mean group size, the arithmetic mean of group sizes averaged over groups; Median group size, the median of group sizes calculated over groups; Confidence interval for median group size.

What is the importance of group size?

Group size is a fundamental consideration in discussion groups because the number of possible symmetrical relations between pairs of members increases much more rapidly than the number of members added to the group. The formula is where x=the number of symmetrical relationships and n=number of members (Bossard 1945).

What is the best size for a group?

Far too often in small group work, the size of the group is set too large. The research shows that three or four, at the most five, is the optimal group size.

What is the average size of a tribe?

By definition, a band was a small, egalitarian, kin-based group of perhaps 10–50 people, while a tribe comprised a number of bands that were politically integrated (often through a council of elders or other leaders) and shared a language, religious beliefs, and other aspects of culture.

What is the ideal number of friends in a group?

The study suggests we benefit from “feeling a sense of belonging within one’s social network” and, really, that could be achieved with any number of buddies. The ideal number is three to five, but it’s of course possible to have fewer than that (or more) and be living your best life.

What is the ideal number of members in a group?

Ideal project team number is 5-6 Certainly groups comprising more than 8 or 9 people are inefficient because they allow some members to coast (‘social loafing’), and their size allows cliques and sub-teams to form, each with their own agenda, which can derail the outcome.

How does Team size affect cohesion?

Size of the Group Small groups tend to be more cohesive that large groups for the following reasons: With small groups, the members enjoy greater face-to-face contact. It means that there’s a high degree of interaction and communication, which helps the members remain united.

How many members should be on a committee?

Most committees have between 12 and 15 members. Committees with more than 15 members tend to be unwieldy and difficult to operate. Committees with less than 6 people tend to be unrepresentative.

How many students should be in a group?

The National Research Center on Learning Disabilities made these recommendations for small groups: “Small group interventions should a) include 2 to 4 students per group; b) have 3 to 4 interventions; c) last 30–60 minutes per week; c) for a duration of 9–12 weeks.”

How do small groups help students?

Small Group Teaching

  • address gaps in students’ knowledge.
  • allow students to discover and engage with a range of perspectives, ideas and backgrounds.
  • assist students in clarifying their attitudes to and ideas about the subject matter, as they test their own ideas and attitudes against those of others.