Answer is A
All elements on the periodic table have a different number of protons that can be represented by its atomic number
A covalent bond means shared electrons between atoms. This is similar to kids sharing markers because the markers (electrons) are being shared between the kids (atoms). Covalent bonds are different than this metaphor because 1) the electrons are constantly moving about while the kids can steal and keep the markers and 2) the electrons and atoms are physically smaller
Molar mass of Na = 23 g/mol
Molar massa of Na2O = 62 g/mol
balanced chemical equation:
4 Na +
1 O2 ------>
2 Na2O
4 . 23 g Na --------------> 2 . 62 g Na2O
x -------------------------> 42,0 g Na2O
124 x = 3864
of Na
Explanation:
Glass is an amorphous solid because its internal arrangement of crystals lacks shape and forms.
Amorphous means without form.
- When a molten substance crystallizes with enough time in a stable environment, it has a well ordered crystalline structure to it. Such materials are said to be crystalline in nature.
- Some substances like glass are formed by rapid cooling and its molecules are not properly formed.
- This makes them to lack a well ordered arrangement of their molecules.
- The long range ordered arrangement seen in crystalline materials is non-existent in glass.
Learn more:
Non-crystalline brainly.com/question/6528456
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