What element is in group 13 and period 2 of the periodic table?
Answers
Answer:
Boron
Symbol:
B
Final answer:
Boron, symbolized as 'B', is the element located in group 13 and period 2 of the periodic table. It has 3 valence electrons and two shells.
Explanation:
The element in group 13 and period 2 of the periodic table is Boron. In the periodic table, columns represent groups while rows represent periods. The group number corresponds with the number of electrons in the outer shell and the period number represents the number of shells that an atom of the element has. So, an element in group 13 would have 3 valence electrons and in period 2 indicates it has two shells. Therefore, the element is Boron (symbol B).
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The onion cells have lysosomes, and the cheek cells do not.
The cheek cells have larger vacuoles than the onion cells.
The cheek cells have a nucleus, and the onion cells do not.
The onion cells have a cell wall, and the cheek cells do not.
Answers
Answer:The onion cell have a cell wall and the cheeks do not
Explanation: I took the test and I love the topic. Hope it helps!!!
Answers
Answer:
1800
Explanation:
3000x.60=1800
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)
C3H8(g) + O10(g) → 3CO2(g) + 4H2O(l)
4H2O(l) + 3CO2(g) → C3H8(g) + 5O2(g)
Answer - B -
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)
Answers
Propane is a hydrocarbon and it will burn in presence of oxygen (it will undergo combustion) to give carbon dioxide and water (all in gas phase).
In presence of oxygen the carbon gets oxidized to carbon dioxide and hydrogen to water.
The general equation for a hydrocarbon undergoing combustion is
Here we are studying the combustion of propane so
x = 3
y = 8
Propane has molecular formula of C3H8
Therefore the balanced equation will be
Or
Answer:
B
Explanation:
its right
Answers
In the given question, elements and compounds are two types of pure substances.
A pure substance is a substance that is made up of only one type of particle, either an atom or a molecule.
An element is a pure substance that is made up of only one type of atom. Elements cannot be broken down into simpler substances by chemical means. There are 118 known elements, each with its own unique properties.
A compound is a pure substance that is made up of two or more different types of atoms that are chemically bonded together in a fixed ratio. Compounds can be broken down into simpler substances by chemical means, such as by heating or reacting with other chemicals.
Therefore, pure substances are classified into two types: elements and compounds.
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Answers
Answer:
Nov 1, 2012 - Energy levels are a little like the steps of a staircase. You can stand on .... What must happen for an electron to jump to a different energy level?
Explanation: