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Sodium metal is soft with low melting point and low heat of fusion because metallic bond is week. Sodium metal has 1 valence electron per atom,
THE METALLIC BOND IS WEEK therefore it is not very strong so, SODIUM METAL IS SOFT..
OTHER metals are hard because they have strong metallic bonding,
These metals have high melting point because they have incomplete valence shell ,
As a result strong covalent bond between atom extends through out the crystals so,
THEY'RE HARD METALS.
(ANSWER FROM TAZEEM HAJRA)
What else can I help you with?
Is it hard or soft?
well It Is hard because all rocks are hard
Is metamorphic rock soft or hard?
There are types of igneous rocks that are hard (eg granite) and others that are soft (eg volcanic ash). There are types of metamorphic rocks that are hard (eg gneiss) and others that are soft (eg marble). Thus "hardness" is not a characteristic that can be used to distinguish between the two.
Could rocks be soft o squishie?
No, rocks are typically hard and rigid due to their mineral composition and the way they are formed. Rocks can vary in hardness, with some being harder than others, but they are not squishy like softer materials.
Are all sedimentary rocks hard?
Hardness in a rock has different meanings. Although sandstone, a sedimentary rock, may be composed of quartz grains (relatively hard on the Mohs scale of mineral hardness), it might be loosely cemented by calcite crystals which are not so hard, making it crushable by the squeeze of a hand. There are other well cemented sedimentary rock types that are very resistant to breaking, however. Certain limestones, breccias, conglomerates, and sandstones take great effort to break into smaller pieces. In general though, geologists will refer to sedimentary rock as soft rock, and igneous rock as hard rock. Igneous rock has an interconnected crystalline structure which makes it very resistant to fracture.
What is used to determine weather water is soft or hard?
lake water is soft we have some by are cottage which we swim in the seaweed and smooth rocks help it to be soft i have to say interesting question
What are the hard and soft matrix used in Impregnated diamond core bit - I'm confused about the fact that a hard matrix is used in sedimentary or soft rocks while a soft matrix is used for hard rocks?
Hard matrix is supposed to be used for digging hard rocks and soft matrix for soft rocks. It's quite confusing to me
Is it hard or soft?
well It Is hard because all rocks are hard
Are rocks soft?
Please describe what you mean by soft and rephrase the question.
Is sandstone a soft or hard rock?
compared to most rocks sandstone is rather soft and brittle, but the hardness of it varies greatly from rock to rock, some sandstone is so soft it can be crushed by stamping on it while other sandstone is so hard it can be used to build buildings
Is metamorphic rock soft or hard?
There are types of igneous rocks that are hard (eg granite) and others that are soft (eg volcanic ash). There are types of metamorphic rocks that are hard (eg gneiss) and others that are soft (eg marble). Thus "hardness" is not a characteristic that can be used to distinguish between the two.
Can minerals or rocks can be soft or hard?
well,the world may never know
What characteristic do rocks?
The Characteristics are hard,soft,smooth,rough,large,small,etc.
Is coal soft?
Coal is typically considered to be a hard, black or brownish-black sedimentary rock formed from the remains of plants that lived millions of years ago. While it may not be as hard as some rocks, it is not classified as soft like clay or sand.
Could rocks be soft o squishie?
No, rocks are typically hard and rigid due to their mineral composition and the way they are formed. Rocks can vary in hardness, with some being harder than others, but they are not squishy like softer materials.
Is metal a hard substance?
No. Some metals are hard, but some are soft.
Is limestone rock hard or soft?
Generally speaking, when a geologist talks of "soft rocks" and "hard rocks" what he or she means is "sedimentary rocks" or "igneous and metamorphic rocks". Limestone is a sedimentary rock, and compared to most other rocks, is relatively soft. lol Different limestones have different hardnesses. Most "marbles" are actually hard limestones, because they have not experienced the high pressures and temperatures required for metamorphism.
Are rocks formed due to thermal metamorphism soft or hard?
Rocks formed from thermal metamorphism are very hard. An example is hornfels. Just search thermal metamorphism and/or hornfels and you'll see some nice explanations on the web.
