Answer:
The proton gradient produced by proton pumping during the electron transport chain is used to synthesize ATP. Protons flow down their concentration gradient into the matrix through the membrane protein ATP synthase, causing it to spin (like a water wheel) and catalyze conversion of ADP to ATP.
Answer:
D)groups 1 and 2
Explanation:
The s-block of elements are made up of those chemical elements we can find in groups 1 and 2 on the periodic table.
A periodic table of element is based on the periodic law which states that "the properties of elements are a periodic function of their atomic number".
In the table;
- elements having the same number of electrons in the outermost shell are placed over one another in vertical columns.
- each resulting vertical column is called a group or family.
- resulting horizontal rows are known as periods.
The s-block consists of elements in groups 1 and 2 having an outermost ""ns"" shell configuration. They are predominantly metals.
For Option A, groups 3-12 is the D-block
Option B, group 18 is filled with noble gases and it makes up the p-block
Option C, group 13-18 is makes up the p-block too.
So, the s-block is made up group 1 and 2 elements.
According to the Bronsted-Lowry definitions, an acid is any substance that donates hydrogen ions; whereas, a base is any substance that accepts hydrogen ions.
In the first reaction, water is acting as an acid because it donates a hydrogen ions.
In the second reaction, water is acting as a base because it accepts a hydrogen ion.
In the third reaction, water is again donating a hydrogen ion so it is the acid.
In the fourth reaction, water is acting as a base by accepting the hydrogen ion from the ammonium ion.
Answer:
1.51 x 10²⁴atoms
Explanation:
Given parameters:
Number of moles of Cr = 2.50mol
Solution;
what is a mole;
a mole of any substance is the amount of substance that contains the avogadro's number of particles which is 6.02 x 10²³ particles
The particles here can be atoms, protons, neutrons, electrons e.t.c
1 mole contains 6.02 x 10²³ atoms
2.5 moles will contain 2.5 x 6.02 x 10²³ = 1.51 x 10²⁴atoms
Along each row of the periodic table, the atomic mass increases from left to right.
Explanation:
The elements in the periodic table are arranged based on rows and periods by increasing atomic number.
The periodic table has rows from left to right and columns from up and down. These rows are called periods and columns are called groups.
The electron organization in an atom explains about the shape and the elements in the same column have similar chemistry. The elements in each column have the same valence shell electron configuration and they have similar properties.
