Ask a New Question
Search
Questions and answers by
ahaahah
Questions (33)
An atom of beryllium can be represented as 9 4 Be
Describe the structure of the beryllium atom. In your answer make reference to
1 answer
170 views
Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells?
A. Burning fossil fuels
1 answer
273 views
what year did the supreme court strike down laws forbidding marriage between blacks and whites?
1 answer
76 views
Come up with 5 short story prompts for a gothic genre.
1 answer
118 views
Will set up the following series circuit with identical fixed resistors. What is the voltage across each resistor if the input
1 answer
123 views
If A1 = 4A, A2 = 2A and A3 = 2A, what would A4 read? if connected in parallel.
1 answer
113 views
If A1 = 3.6A and A2 = 2A, what would A3 read? if ammeters are connected in series.
1 answer
139 views
If A1 = 3.6A and A2 = 2A, what would A3 read? if ammeters are connected in parallel.
1 answer
100 views
A carbon atom has a relative atomic mass of 13.6.
30% of the carbon atom has a mass number of 12.8. 15% of the carbon atom has a
1 answer
161 views
a and b are two points.
shade the region which contains those points which are both closer to a than b and less than 5cm from b.
1 answer
102 views
Which of the following is the most reactive element?
Sodium Rubidium Potassium
1 answer
137 views
finish the sentence: the elements found in Group 7 of the periodic table..
1 answer
98 views
the number of protons (which equals the number of electrons) in an atom. It is sometimes called the proton number
1 answer
130 views
What did Newlands call his groups of elements?
1 answer
83 views
What comment can you make about the melting points of Group 1 elements? Are they high or low? etc
1 answer
111 views
What comment can you make about the melting points of Group 1 elements?
1 answer
109 views
expand and simplify. show your working.
x(x+2)(x+4)
1 answer
86 views
b) Define a cyber threat. [1]
b) State the purpose of cyber security. [1]
1 answer
122 views
Explain how a user could be fooled into running a Trojan. (2)
1 answer
110 views
Which element is most likely to gain electrons and become a negatively charged ion?
1. chlorine 2. oxygen 3. lithium 4. magnesium
1 answer
101 views
how would you work out the centre of enlargenment of a transformed square, since all lines are equal?
1 answer
78 views
do metal atoms always have a full outer shell originally/normally? when they're not ions.
1 answer
97 views
do metal atoms always have a full outer shell?
1 answer
89 views
What discovery proved Mendeleev's periodic table to be correct and Newlands' to be wrong?
1 answer
134 views
Why might some people say that Jesus' miracles were fake?
1 answer
124 views
Why might some people say that Jesus' miracles were fake, or a coincidence?
1 answer
107 views
Did Jews believe that Jesus was the son of God?
1 answer
115 views
Bases are commonly:
1 answer
141 views
What two reactants are needed for photosynthesis?
1 answer
173 views
Write a word equation for these reactions:
sodium burning with the oxygen in air
1 answer
119 views
Write a word equation for these reactions:
calcium reacting with oxygen to form calcium oxide
1 answer
125 views
A salt is a metal element bonded to...
1 answer
119 views
Bag A contains 5x coins. Bag B contains 3x coins. 8 coins are taken from Bag B and put into Bag A. The ratio of coins in Bag A
1 answer
187 views
