2 years ago

Use a periodic table to find symbol,atomic mass number for each of the following elements need help thank you

Mathematics

2 answers:

k0ka [10]2 years ago

7 0

(*KEY*
Element = Symbol, atomic mass #)

Calcium = Ca, 20
Sodium = Na, 11
Carbon = C, 6
Hydrogen = H, 1
Oxygen = O, 8

muminat2 years ago

6 0

Element | Symbol | Atomic Number | Atomic Mass
Calcium - Ca 20 40.078
Sodium - Na 11 22.990
Carbon - C 6 12.011
Hydrogen - H 1 1.008
Oxygen - O 8 15.999

You might be interested in

Which ratio is equivalent to 3/7? A) 6 to 10 B) 9:12 C) 12/35 D) 7 to 3

Leona [35]

we are ratio as

$=\frac{3}{7}$

It will be equivalent to only those terms which would be multiple of this term

so, we will multiply top and bottom term by 5

and we get

$=\frac{3\times 5}{7\times 5}$

$=\frac{15}{7\times 5}$

$=\frac{15}{35}$

so, it is very similar to 12/35

so, it will be equivalent to 12/35

so, option-C.......Answer

7 0

2 years ago

0.25x-8=16 what value of x makes the equation true?

prohojiy [21]

0.25x-8=16 add 8 to both sides. you get 0.25x=8. divide by .25 on each side x=32

8 0

3 years ago

If f(x)= 3x2 and g(x) = x+2, find (f.g)(x).

Paha777 [63]

Step-by-step explanation:

$f(x) = 3 {x}^{2} \: and \: g(x) = x + 2 \\ (f.g)(x) \\ = f(x).g(x) \\ = 3 {x}^{2} .(x + 2) \\ \red{ \boxed{ \bold{ \therefore f(x).g(x)= 3 {x}^{3} + 6 {x}^{2} }}} \\$

7 0

2 years ago

Forgot to add attachment :'> ight 7th grade math 25 points each thank you

ad-work [718]

Answer:

-7 and -5

Step-by-step explanation:

7 0

2 years ago

Please answer quickly, thanks -2 + ?? = -12

Arisa [49]

Answer:

-10

Step-by-step explanation:

-2 + ? = -12

+2 +2

?= -10

3 0

2 years ago