Halogens and noble gasses are all nonmetals (except antimony which is a transition element). The noble gasses are, as their name implies, all gasses, whereas the state of the others can vary. Noble gasses are nonreactive, halogens are very reactive. Metals are solid (except for mercury) and their reactivity varies.

The elements found in group 17 are known as the halogens and have 7 electrons in their outer shell. The elements found in group 18 are known as the noble gases and have a complete number of electrons in their outer electron orbital, called a valence shell, making them stable and mostly chemically inert.

Halogens share many similar properties including: They all form acids when combined with hydrogen. They are all fairly toxic. They readily combine with metals to form salts.

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”).

The best way we can tell whether a gas is a halogen or not, is if it has a distinctive color. See the explanation.

Halogens are very reactive because they have seven valence electrons and need one more to have eight valence electrons (an octet). The noble gases have filled valence shells as they occur in nature. Helium has a duet of valence electrons, and the rest of the noble gases have an octet.

Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).

Halogen lamps are used in automotive headlamps, under-cabinet lighting, and work lights. In addition, halogen reflectors like MR and PAR lamps are often preferred for directed lighting such as spotlights and floodlights. They are also increasingly being used as a more efficient alternative to incandescent reflectors.

Yes, LED bulbs are as bright as halogen. Not only that, but an LED bulb will produce the same amount of light as a halogen bulb while using 85% less power, so you can replace a 50 Watt halogen bulb with a 7.5 Watt LED.

Advantages. Small, lightweight, and easy to produce. A typical incandescent light may last up to 1000 hours, while a halogen light can last over 2500 hours. Halogen lights produce a color temperature closer to that of the Sun, which is more white in color compared to the orange color given off by incandescents.

DO HALOGEN LIGHTS USE A LOT OF ENERGY? Yes, Halogen bulbs are extremely inefficient when compared to CFL or LED bulbs. Recent Federal regulation has effectively banned production of many common, high wattage halogen type bulbs with standard E26 screw in bases.

Halogen lightbulbs have a far shorter lifespan than other bulbs, lasting for around 2,000 hours, or two years, when used for approximately three hours a day. In comparison, LED bulbs last for around 25,000 hours.

The large variance between an LED bulb and, say, a halogen bulb wattage is the reason LEDs are so much cheaper to run. This means that the LED spot uses 90% less electricity to run and therefore it costs 90% less. We have 6W Led bulbs that are replacements for 60W halogen bulbs, again saving 90% energy and cost.

Halogen heaters radiate heat directly onto objects, rather than relying on convection to circulate the warmth. As a result, halogen heaters work quickly, and they’re efficient – so cheap to run.

Halogen heaters tend to be the cheapest radiant heaters as they have a low power rating (but also produce less heat), while oil-filled radiators are often the cheapest convector heater because there is a thermostat to control the temperature.

For most of us, the cheapest heating system is going to be mains gas fuelled. If you’re living off the grid, LPG is the most cost effective heating option. If you take full advantage of Economy 7 electricity tariffs, you may be able to match LPG systems in running costs.

Often you can run them at 400, 800 or 1200 watts, so that would work out at: 400W = 6 pence per hour. 800W = 12 pence per hour.

Anything that produces that kind of concentrated heat is bound to be expensive. Let’s take the 2000w – or 2kW – top level setting. This will cost roughly 31p an hour to run, based on the average UK tariff. If you have this on in an evening for three hours, this would mean nearly £1 of usage.

A common wattage for space heaters is 1,500 watts. Apply the formula 1,500 x 24 ÷ 1,000 x $0.20 to determine the cost to run the space heater for a day. (Dividing by 1,000 changes watt hours to kilowatt hours.) In this case, it will cost $7.20 if it was running for 24 hours straight.

Halogen heaters can produce high intensity white light which could cause damage to human eyes. Care should be taken to ensure that personnel cannot look directly at the heaters during operation. If necessary, a filter to reduce the glare or protective glasses should be provided.

Energy saving – halogen heaters provide heat almost instantly and the radiant heat released by the heaters effectively heats a small area, and this greatly reduces the amount of energy the heaters consume. Safety –the halogen lamps themselves do not actually heat up so they are considered safe in most environments.

Halogen heaters are said to be safer than other types of heaters. Unlike traditional heaters, these devices use the radiation from a halogen light to heat the air space in homes and workplaces. Apart from these, there are no significant health risks of using this heater.

It is not safe to leave a halogen heater on overnight. You should never turn on a halogen heater of a lead extension that can easily overload and cause fires, leave portable heaters unsupervised or let them turn on during sleep. …

And with portable heaters having caused 73 deaths, around 1000 injuries and over 3,800 fires since 2009/10,[1] the dangers posed by using them incorrectly are very real. Never power a halogen heater from an extension lead – these can easily be overloaded and cause fires.

Best Halogen Heaters

• Pifco Portable Halogen Heater.
• Prolectrix EH0197S Halogen Heater.
• Lloytron F2106GR 3 Bar Halogen Heater.
• Status HH-1200W1PKB Premium Portable Oscillating Halogen Heater.
• TOOL-GENIUS® Halogen Heater.
• Kingavon BB-HH201 1200W Oscillating Halogen Heater.
• Benross 42400 Oscillating Halogen Heater.

For uniform warming of a small volume, a fan-forced heater may be best. For efficient heating of items in an otherwise unheated space a halogen (radiant) heater may be best since it only heats the material, not the entire air volume.

Top 10 Best Room Heater in India 2021

1. Havells Oil Filled Radiator – 9 Fin, 2400-Watt PTC Fan Heater (Best Overall)
2. LG 1.5 Ton 3 Star Hot and Cold Inverter Split AC (Best All Purpose)
3. Orpat OEH-1260 2000-Watt Fan Heater (Apricot) (Best in Budget Options)
4. Voltas 1.5 Ton Hot & Cold Window AC (Copper 18H CZP White)

Oil-filled heaters are a viable option for patients with respiratory disorders, although they’re about 10 times more expensive than the most basic rod heater. Oil-filled heaters have pipes filled with oil. The air doesn’t dry out because it’s passing over hot liquid oil to soak up heat.

Oil column heaters are safer than quartz heaters and are good for heating bedrooms overnight. Fan – A good little heater for one person and/or a small room as it heats the air quickly. Some fan heaters have heating and cooling settings for winter and summer.