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What important characteristic do the alkali metals ad alkaline earth metals have in common?
Thet are all highly reactive.
They react with oxygen (air) , water and acids.
The further down the Groups, they become more reactive, to the point of explosion.
The metals react with oxygen to form the metal oxide (bases).
The metals react with water to form metal hydroxides (alkalis) and hydrogen
The metals react with acids to form chemical salts and hydrogen .
In terms of reactivity, Francium , reacts the same as other Group (I) & (II) metals, but is not found in the 'open' lab. because it is also radio-active.
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What are alkaline earth metals?
They are a series of elements, or metals, on the Periodic Table of Elements. The alkaline earth metals are: beryllium, magnesium, calcium, strontium, barium, and radium (i.e, the ones with two electrons in their outer shell and common oxidation state +2, right next to the alkali metals with common oxidation state +1). They're all silvery-colored and soft, and they combine with water to form alkaline hydroxides, but not as readily as the alkali metals do.
What is color center of alkali halides?
Color centers in alkali halides are defects in the crystal lattice that result from the absence of an alkali metal atom or halide ion, leading to the creation of an electron trap or vacancy. These defects can absorb specific wavelengths of light, resulting in the coloration of the material. Common examples include the F-center, which forms when an electron occupies a vacancy left by a halide ion, imparting a characteristic color to the crystal. The presence and type of color centers can significantly influence the optical properties of the alkali halide.
Why are the groups alkaline earth metals halogens called so?
They react with water like the alkaline metal but does not change or melt with fire.The alkaline part of the name comes from the fact that these metal form alkaline solutions, when they react with water. The earth part was added to differentiate these from the group one metals. Alchemists called them earth metals because they though that their oxides were new elements.In the middle age the oxides of these metals (metals which are not known in time) are called alkaline earths: alkalinebecause these oxides react with water forming an alkaline solution and earths because in the past non-metallic compounds were called earths.
How is the fur coat of a bear related to homeostasis?
The fur coat of a bear helps to maintain a body temperature that is warmer than the surrounding environment; a characteristic common to mammals.
Why is framing important for your artwork?
The three most common importance areImproves VisualPreserve for long periodProtection from surroundingFor all such factor framing is very important for Artwork.
What is the important characteristic do the alkali and alkaline earth metals have in common?
they all have at least one electron
What characteristic does the alkali metals alkaline earth metals and the halogens have in common?
All alkali metals, alkaline earth metals, and halogens have a common valence electron configuration: alkali metals have 1 valence electron, alkaline earth metals have 2 valence electrons, and halogens have 7 valence electrons. This shared electron configuration influences their chemical properties, such as reactivity and bonding tendencies.
What are the common properties of halogen?
highly reactive with alkali metals and alkaline earth metals
What is an indicator acid or alkali?
An indicator is a substance that changes color in the presence of an acid or alkali. Common indicators include litmus paper (blue for alkaline, red for acidic), phenolphthalein (colorless in acidic solutions, pink in alkaline solutions), and universal indicator solution (multiple colors to indicate pH level).
Oven cleaner acidic alkaline or neutral?
Oven cleaner can be either acidic or alkaline, depending on the type of cleaner. Acidic oven cleaners are effective at removing tough stains and grease, while alkaline cleaners are better at breaking down food particles and grime. Neutral oven cleaners are less common but can be used for general cleaning.
What alkali has a pH value between 11 and 14?
A solution with a pH value between 11 and 14 is highly alkaline. Common examples of alkalis that can have such pH values are sodium hydroxide (NaOH) and potassium hydroxide (KOH).
What are alkaline earth metals?
They are a series of elements, or metals, on the Periodic Table of Elements. The alkaline earth metals are: beryllium, magnesium, calcium, strontium, barium, and radium (i.e, the ones with two electrons in their outer shell and common oxidation state +2, right next to the alkali metals with common oxidation state +1). They're all silvery-colored and soft, and they combine with water to form alkaline hydroxides, but not as readily as the alkali metals do.
What important characteristics do the alkali metals and earth metals have in common?
They all have at least one electron.
What is the most common charge for alkali earth metals?
The most common charge for alkaline earth metals is +2. This is because they have 2 valence electrons, which they tend to lose to achieve a stable octet electron configuration.
What are the names of some common alkalines?
Some common alkaline substances include sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2). These compounds are often used in cleaning products, manufacturing processes, and agriculture.
What is the Difference between a bases and alkali?
Alkali is a basic, ionic salt of an alkali metal or alkaline earth metal element. Alkalis are best known for being bases that dissolve in water. (Most common form is hydroxide.)A base is most commonly thought of as an aqueous substance that can accept H+ ions.A soluble base is also often referred to as an alkali if hydroxide ions (OH−) are involved."All alkali are bases but not all bases are alkali"
What is the name of a no acid and alkali substance?
They are called as neutral solutions. A common example is pure water.
