Advertisements
Advertisements
प्रश्न
An atom can contain protons which have a positive charge (+) and electrons which have a negative charge (−). When an electron and a proton pair up, they become neutral (0) and cancel the charge at. Now determine the net charge:
7 protons and 6 electrons →
Advertisements
उत्तर
7 protons and 6 electrons → (+7) + (−6)
= +1
= 1 proton ⊕
APPEARS IN
संबंधित प्रश्न
Scientists use the Kelvin scale (K) as an alternative temperature scale to degrees Celsius (°C) by the relation T°C = (T + 273)K. Convert the following to Kelvin:
−275°C
A poet Tamizh Nambi lost 35 pages of his ‘lyrics’ when his file had got wet in the rain. Use integers, to determine the following.
If Tamizh Nambi wrote 5 pages per day, how many day’s work did he lose?
An atom can contain protons which have a positive charge (+) and electrons which have a negative charge (−). When an electron and a proton pair up, they become neutral (0) and cancel the charge at. Now determine the net charge:
9 protons and 12 electrons →
An atom can contain protons which have a positive charge (+) and electrons which have a negative charge (−). When an electron and a proton pair up, they become neutral (0) and cancel the charge at. Now determine the net charge:
4 protons and 8 electrons →
Scientists use the Kelvin scale (K) as an alternative temperature scale to degrees Celsius (°C) by the relation T°C = (T + 273)K. Convert the following to Kelvin:
45°C
Find the amount that is left in the student’s bank account, if he has made the following transaction in a month. His initial balance is ₹ 690
(i) Deposit (+) of ₹ 485
(ii) Withdrawal (−) of ₹ 500
(iii) Withdrawal (−) of ₹ 350
(iv) Deposit (+) of ₹ 89
(v) If another ₹ 300 was withdrawn, what would the balance be?
A poet Tamizh Nambi lost 35 pages of his ‘lyrics’ when his file had got wet in the rain. Use integers, to determine the following:
Tamizh Nambi pays Kavimann ₹ 100 per page for his help. How much money does Kavimaan receive?
Kalaivani had ₹ 5000 in her bank account on 01.01.2018. She deposited ₹ 2000 in January and withdrew ₹ 700 in February. What was Kalaivani’s bank balance on 01.04.2018, if she deposited ₹ 1000 and withdraw ₹ 500 in March?
The price of an item x increases by ₹ 10 every year and an item y decreases by ₹ 15 every year. If in 2018, the price of x is ₹ 50 and y is ₹ 90, then which item will be costlier in the year 2020.
In a magic square given below each row, column and diagonal should have the same sum. Find the values of x, y, and z
| 1 | −10 | x |
| y | −3 | −2 |
| −6 | 4 | z |
