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What is the charge on a radium ion?


coordination number: 12 170 pm
Pauling Empirical Crystal Radius
ion charge: +2 140 pm

What is the formula for radium oxide?

O is a Group 16 nonmetal. It forms O²⁻ ions. So the formula of radium oxide should be RaO.

What is the value of radium?

Because of its rarity and high demand, radium had become the most expensive material in the world: in equal mass, it was worth more than diamond. One gram of radium costed $ 100,000 at the time (a bit less than 2 million euros in 2018).

What chemicals are used to make glow sticks?

What’s in a glow stick? Our glow sticks contain two chemicals; hydrogen peroxide and tert butyl alcohol, these mix with a fluorescent dye to achieve the coloured glowstick effect. It’s the hydrogen peroxide that is held inside the glass vial.

How do you make glow sticks with highlighters?

Method 1: With Highlighters

  1. Buy and experiment with different highlighters to see which ones glow. . Write on white paper with a highlighter and perform a black light test.
  2. Get your tools ready. .
  3. Carefully remove the highlighter felt. .
  4. Put the highlighter felt in water. .
  5. Wait. .
  6. Observe the water. .

What makes glow sticks light?

But how do glow sticks glow? Chemiluminesence is a chemical reaction that causes a release of energy in the form of light. All liquid glow products depend on a chemical process known as CHEMILUMINESCENCE to produce their light. When the stick bends, the glass vial breaks allowing the two liquids to mix together.

Can ant spray harm cats?

Many insecticides, such as those used in ant baits, contain attractants like butter or peanut butter, which cats cannot resist. A larger danger is that your cat will ingest part of the plastic or cardboard container, causing a blockage. Traditional sprays and repellents can be toxic to your pets.

What is paw flicking?

“Paw flicking” Paresthesia (a local skin reaction that feels like a “pins and needles” sensation, similar to when a foot or arm falls asleep.)

What is the safest flea collar for cats?

  • Best Overall: Seresto 8 Month Flea & Tick Prevention Collar for Cats & Kittens.
  • Best Natural: TropiClean Natural Flea & Tick Cat Collar.
  • Best Collar Tag: Only Natural Pet Easy Defense Flea & Tick Tag for Dogs and Cats.
  • Best for Kittens: Arava – Dead Sea Pet Spa Arava Flea & Tick Prevention Collar.

What is the safest cat flea treatment?

Use a spray or powder containing pyrethrins or natural pyrethrum. These are the least toxic of all the insecticides used on pets, and they are found in both conventional and natural flea-control products.